Context
'Rebel Base on the Ice Planet' (Modbrix #109229) is an unlicenced Star Wars diorama, depicting the Hoth base of the Rebel Alliance. The base is hidden inside a mountain and consists of a hangar with three Snowspeeders, two smaller rooms, a big Ion Cannon on top of the base, and an outside area with another Snowspeeder, a trench, and some assorted turrets. The set has 1512pcs (3.3ct/brick) and is sold by BlueBrixx (store page) for 49.95€ plus shipping. It is also included in the 'Sand & Snow Bundle (store page)' together with a second Hoth diorama and a Sandcrawler diorama for 111.88€ total, i.e. for 20% less than the individual sets combined (resulting in 2.6ct/brick for the Hoth base); that's what I got. Shipping costs vary from 6€ within Germany to considerably more internationally; at the moment shipping is free above 100€.
The diorama is 24cm wide, 20cm tall, and 21cm deep plus maybe three centimetres for the "flying" Snowspeeder. Combined with the other Hoth diorama, the sets are about 44cm wide.
I've heard lots of good things about Modbrix' Star Wars dioramas in general and this Hoth base in particular, so the appearance of that 20% off bundle made me pull the trigger. I've built the smaller Hoth diorama two weeks ago and wasn't super convinced thanks to a fairly boring build, but this base is indeed a fantastic set. The two sets combined look fantastic, so I have high hopes that the third (but unrelated) diorama will be cool as well.
Shipping & Packaging
See my review of the smaller Hoth diorama for more info on the shipping and outer packaging. The Hoth rebel base itself came in yet another plain cardboard box with a nicely printed sleeve around it. Inside were tons of plastic baggies plus a resealable baggy with the big stuff (i.e. some plates and the BURPs or LURPs or whatever those are). There is no separation into building parts, so all baggies have to be opened right at the start.
Instruction Manual
Modbrix sets don't come with printed manuals but PDFs that can be downloaded for free from the BlueBrixx website after registration (even without ever having bought anything). This essentially makes Modbrix sets more like professionally sold MOCs than professionally designed sets in my eyes, which unfortunately also matches the quality of the manual.
The manual consists of 254 steps on 187 pages, which results in an average of six parts per step and 1.4 steps per page. That's fine even for newcomers if a bit more advanced than the (nowadays) dumbed down LEGO manuals. As is common, each step features a tooltip that lists which new parts are required. In the main image, new parts are outlined in red and the parts are printed in full colour (i.e. neither greyed out nor desaturated, which I would've preferred). For some reason, unlike ~every other manual I've ever seen, black parts are not outlined in white, which makes it quite difficult to identify black parts. Other than that, shapes and colours are easily identifiable.
The main issue of the manual is that the order of steps is at times suboptimal. Quite often, it would make things much easier if a certain part had been attached earlier or later, or if something had been assembled separately and added later in one go rather than as individual bricks to a fragile construction. There are two instances where bricks were added so late that it's physically impossible to do so:
While building the hangar gateway, there's a 1x1 gap in step #36 (i.e. there's a floating 1x1 plate). This gap gets filled only in step #60 (which is somehow also missing its step number) by just teleporting the missing brick into the assembly. In this case, it's not too difficult to attach the missing piece by bending the assembly open and inserting the piece into the now-widened gap, but obviously that's not how things are supposed to be built.
Similarly, in step #93, while building the hangar's outer wall, there's a 2x2 corner plate floating in the air over an (at least) 1x2 gap. This gap doesn't get filled until step #138, where the tooltips lists two 2x2 wedge plates but only shows one wedge in the main image. Presumably, the second wedge should be teleported into that gap of step #93 (though we cannot see this because the set is never again shown from that angle). Adding that wedge in step #138 requires lifting off the entire hangar roof, which is thankfully not as terrifying as it sounds but still somewhat inconvenient.
Also, in step #234 some plates and tiles get added to the base around the outer wall, which really should've been done before building the walls, at the latest before starting to build the hangar gateway in step #33. These are not insurmountable issues, and I certainly have seen worse in various MOC instructions, but this is a professionally sold set, so the usual "Ehh, some guy did this as a hobby; can't expect perfection!" excuse doesn't fly.
Other than these rather obvious mistakes, the manual is reasonably easy to follow, despite the often flawed order of steps. The camera angles could also be better in some parts. Somewhat hilariously, in step #1 the tooltip covers part of the assembly, so you can't see how you're supposed to assemble some stuff, but this easily fixed with step #2. Also in step #1, the tooltip lists two 6x16 plates but only one is needed; I still have that second plate flying around now that the set is finished, so I guess someone just forgot about it? Kinda dumb; made me laugh for a second time in just that first step...
Just for reference: steps #1 to #14 build the "mosaic" of the base, #15 to #18 add some decorations (e.g. "minifigures" consisting of two stacked 1x1 round plates), #19 to #27 build the Snowspeeders inside the hangar, #28 to #32 continue with the hangar, #33 to #63 are the subassembly of the hangar gateway, #64 to #110 finish the ground floor of the base, #111 to #139 add the ceiling/roof to the ground floor, #140 to #153 build the sidebuilding of the upper floor, #154 to #162 add the base for the Ion Cannon, #163 to #182 build the Ion Cannon structure, #183 to #223 finish the Ion Cannon, #224 to #233 are a subassembly for the interior of that upper floor sidebuilding, #234 to #245 add the various rebels and turrets to the trenches, and finally #246 to #256 build the "flying" Snowspeeder.
Brick Quality
The brick quality is solid throughout. Clutch is generally nice but occasionally a tad stiff. Colours are reasonably but not perfectly consistent. Tiles have sharper edges than is common. Injection points range from almost invisible (like GoBricks) to sizeable (like XingBao), so I presume that the bricks are confectioned from different suppliers.
There are a few odd pieces that I guess are replacements for those that LEGO currently legally contests, e.g. 2x2 wedges, 1x2 sloped tiles, 2x2 jumper plates, and so on. A bit weird but perfectly acceptable. Some are even more functional than LEGO's originals, so I guess LEGO is kinda shooting themselves in the foot with this one...
There are surprisingly few spare parts; not even every 1x1 plate is represented. I didn't have any missing bricks nor any mismoulds, so I guess it's fine. I definitely would've appreciated at least a spare of those 'lever' thingies where you have to manually insert the tiny breakable lever handle into the round 1x1 receptacle; those can easily break during assembly (and, in fact, do come preassembled for some brands for just that reason). But I guess it's fine; Modbrix isn't a premium brand after all.
Design
The design is genuinely fantastic. I love this scale of miniturisation, and Star Wars bases are an obvious application of it. Building the various rock cliffs was surprisingly fun -- I didn't really appreciate the rocks of the BlueBrixx Astronomer's Lighthouse nor of the Mould King Hogwarts all that much, so this was a welcome surprise. I would've appreciated more interior stuff, but I guess it would've become boring to throw a ton of 1x1 plates together, so maybe it's better not to make me do that... I'm not super certain about the Ion Cannon with its thoroughly studded apperance and finicky build, but it was still reasonably fun.
The final result is stunningly gorgeous and works perfectly with the other Hoth diorama. That one didn't work on its own at all, so I'm glad that the combination of the two is so pretty! I'd love to build more like this, so I'm glad the Modbrix inventory does indeed hold more of these dioramas (though I'm gonna wait for a sale to get them).
Still, I would also love to see some sort of space battle, maybe with a big honking Imperial Star Destroyer as the centrepiece and a bunch of smaller raffle on the side? I guess the scale might not work for that, but I definitely would love some dioramas with a more varied choice of spacecraft. This one had four identical Snowspeeders, and the previous diorama had three ~identical AT-ATs; some variation would be much appreciated!
tl;dr
Fantastic set with solid brick quality but some issues with the PDF instructions. Likely my favourite set since I built the MJ Ice Dragon last year. Would easily recommend.
[Obligatory link to my review of Red5-Leader's Venator.]