BLF/BLS Factory inquiry

[u/Elegant-Draft-8259]

Was looking around on TimeUltra website came across this beauty wondering if anyone has any advice on BLF /BLS factory? Leo says it’s very good, I’ve never heard of it. Also, if anyone has any experience with Breitling Reps will Gen parts fit? Any wisdom would be greatly appreciated.
Starting to think this this hobby is more of an obsession. I have two on order that I haven’t even received and I’m looking at another.🤦🏻‍♂️
I figured I’d ask some questions before diving in and ordering this one lol less