Had a Kuiu pro for my Razor UHD’s, and it was great. But the fabric did seem to deteriorate after a few years, idk why. Also, other than my UHD’s, it wasn’t really shaped to fit any Bino particularly well.
I’m a huge fan of the FOB, and it’s what I have now. I’ve owned 2 marsupials and wanted to love them. Heck, I was the guy who railed against the FOB for just being a copycat of the marsupial. But dangit, it just fits my Maven B6’s too well to argue. I’m a huge fan. It’s well made and comfortable as well.
I’m a huge believer in “buy the best harness for your binos.” So many people buy an AGC or a Kuiu because X-number of people say it’s great. But truthfully, all harnesses are cut as “one size fits most,” and inevitably some just DONT fit certain binos, even if the sizing charts say they should. I would buy several different ones, test fit your binos, and return the one that doesn’t work. I currently have Maven B6 10x50’s, and I tried them in a Kuiu Pro, AGC Ravus, Marsupial, and the FHF FOB. The FHF is perfect for those binos, but may not be for others. Test fit several and go with whichever fits your binos best.