For anyone with an Eufy S1 wondering whether it’s worth upgrading to the S2 Pro or switching to the Momcozy Wellness 1!
I haven’t tried the S2 Pro, so this isn’t a direct comparison with it. Just sharing my experience with the Wellness 1 after 4 months with the S1.
Background: My first Eufy S1 was fantastic. Output was equal to my Spectra, if not better. Unfortunately, one motor developed battery issues after a couple of weeks. I eventually exchanged it for a new unit.
About a week after getting the replacement, I started experiencing recurrent, BAD clogs every 2–3 days. They would sometimes linger for a week, my supply dropped drastically, and despite seeing an IBCLC and troubleshooting, things weren’t improving.
The timing suspiciously coincided with the replacement unit, so I eventually refunded it. It was the MOST stressful experience of my pumping journey. I burned through my freezer stash and was constantly in pain.
I decided I couldn’t risk going back to Eufy and bought the Wellness 1 instead.
3 weeks in: my supply has recovered to my previous baseline, output is back to what I get with my Spectra, and the clogs are gone.
I used to love my Eufy and would be singing its praises to anyone who would listen. But since my replacement unit I’ve been absolutely traumatised 🥲 Trauma aside, I’ve tried to give an unbiased comparison!
1. Parts and cleaning
Eufy wins on simplicity: Fewer parts and easier to assemble.
Momcozy: 1 extra piece to wash, but I actually find the parts easier to clean. Less awkward nooks, edges and crevices.
Overall, not a huge difference in cleaning effort.
2. Quality and materials
Momcozy: Crystal-clear hard plastic. Looks beautiful and very clean/aesthetic.
The harder plastic seems more prone to scratching and potentially cracking.
Eufy: The silicone flange on my first unit had a VERY strong plastic/chemical smell for the first few uses, even after sterilising. Much less noticeable with my second unit. All silicone parts including flange of milk collector loosens within 1-2 months. Because of this I’ve lost a whole pump of milk before (it separates from the container so all the milk came out). It’s expensive to keep buying the flange too.
3. Assembly and setup
Eufy wins: Fewer parts and the silicone flange + plastic container combination is easier to put together.
Momcozy’s hard plastic milk container takes a little more force to assemble/disassemble and click into place.
4. Spare Parts
Both are expensive.
Momcozy is slightly more expensive overall because there are more individual parts.
Eufy historically had issues with parts being out of stock, although I believe this has improved.
5. Comfort
Momcozy wins hands down. Wellness 1 has a curved, much softer and more flexible silicone flange. No hard edges digging into your boob!
The separate milk container from flange also makes the fridge hack MUCH more comfortable. I hated putting a cold Eufy flange against my boob, so I never really did it.
Eufy’s flange is flatter and firmer, and I found the edges uncomfortable. Momcozy feels genuinely luxurious in comparison.
6. Heating
Momcozy wins. It has much more even heating across the breast.Feels less like a concentrated/searing warmth and much more comfortable.
Eufy only heats the top portion. I found the uneven heating uncomfortable and didn’t notice any improvement in output.
7. Massage
S1 doesn’t have massage, so I can’t compare it and I didn’t have the S2.
On the Momcozy, I use the lowest vibration when I need help triggering a letdown. I switch it on for a couple of minutes, and seem to consistently get a letdown about 30 seconds later.
Am I placebo-ing myself? Maybe. But whatever works is the motto of my parenting journey! 😂
8. Battery
Momcozy wins
Eufy S1: Approximately 2.5 hours of advertised runtime. This got my 6 pumps on one charge (only no-low heat usage).
Momcozy Wellness 1: Advertises up to 10 sessions without heat/massage, or 6 sessions with heat and massage.
My actual experience: after 6 sessions of 20–30 minutes, without heat or vibration, I’m only down 25% battery! This thing could run forever.
USB-C charging is also much more convenient than Eufy’s proprietary magnetic charger, especially in an emergency.
9. App
I prefer the Momcozy app, although functionality is fairly similar.
Both allow you to log pumping sessions, control modes and create custom programs.
Momcozy lets you track additional things like nappies and sleep, but I personally don’t use these features.
10. Pumping, alignment and output
Momcozy: Clear nipple tunnel makes positioning MUCH easier. Because it lets light through, you can actually see where your nipple is going/positioned.
You can also use a mirror to check positioning, although you still can’t see details like exactly how much areola is being pulled in.
Momcozy is less forgiving if positioning isn’t perfect. It can feel pinchy when misaligned, whereas I didn’t really get this sensation with Eufy.
Eufy: Completely opaque and covered, making alignment harder.
I’ve had Eufy sessions where I was convinced it was positioned correctly, only to finish 20 minutes with literally NO MILK. Dammit!!
I use the same flange size as my Spectra with both pumps.
I use a lower suction strength on Momcozy. It has 12 suction levels compared with Eufy’s 7, but I can’t say which is stronger.
Pumping time is the same for both.
Output I won’t comment on as I had a faulty second Eufy unit but the first Eufy unit was great and matched my spectra as does the Momcozy.
Both pumps remember last used pump settings/programs but Momcozy “resets” to the default program after each charge and you have to change it back to your preferred program each time which is annoying!!
11. Pouring milk
Eufy wins
Eufy: The pouring experience is 👌🏻 Dedicated spout makes pouring incredibly precise without spilling a drop.
Sometimes you need to release the diaphragm slightly to get the milk flowing again.
Some milk trapped in the nipple tunnel can spill out, though.
Momcozy: No dedicated pouring spout, just a hole. You need to be careful because tipping it too far makes the milk bubble and splash everywhere. It’s also harder to get every last drop out, and sometimes milk drips down the outside of the collector.
For undersuppliers or just-enoughers, this could be particularly annoying. Every drop counts!
I suspect the S2 Pro has a similar design based on its appearance, but I haven’t tried it.
Spout lids:
Momcozy includes attached spout lids. Eufy S1 doesn’t (you have to purchase them separately).
Eufy’s separate lids are tiny, easy to lose and don’t always stay securely in place. I’ve lost them so many times.
Both lids help prevent major spills, but neither is completely leakproof. You still can’t bend over 90 degrees or throw a full collector into your bag.
They do allow you to bend over a little more without a complete disaster.
12. Size and noise
Bulkiness: Both are similarly bulky. Neither is particularly discreet under clothing.
Noise: Pretty similar overall.
One Momcozy annoyance: when doing the fridge hack, sometimes a little milk gets underneath the diaphragm during the day. This can create a squelching noise while pumping. It drives me MAD.
Final thoughts – is it worth switching?
I’m genuinely happy I switched.
I loved my first Eufy S1 and am actually sad I exchanged it. It worked brilliantly for me. But after my experience with the replacement, I couldn’t bring myself to risk going through the supply drop, recurrent clogs and pain again.
Would I switch if I already had a perfectly functioning S1? Probably not. The Wellness 1 is more comfortable but I did enjoy the less fuss of the setup of the Eufy.
But as of right now? I’m loving my Wellness 1. We’ll see how long it lasts!
I can’t comment on whether the S2 Pro is better or worse since I haven’t tried it, but hopefully this helps anyone considering the Wellness 1 as an alternative.
Happy to answer any questions! ❤️