Ive been using the original V1 Onemo since it was released - and it still looks brand new. I cant say enough on the build quality, material, and zippers. Absolutely fantastic.My wife and I just purchased the 25L and 35L V2s - and so far PGY seems to have improved on the overall quality. I do have a few gripes, but overall were super happy with them._______The good:1. I absolutely love my 35Ls topload access. Thats worth the upgrade alone.2. With the addition of the 35Ls topload access, that allowed for room for another accessory pocket for chargers and cables. Thats also been super handy.3. The upgrade to the expandable front is really great. Thats been improved in every way - way more useful now. Its no longer just a big pocket.4. The portable pack is a bit bigger, and doesnt feature an expandable top. I love this, I never used the expandable top - but I couldnt fit some of my lenses in it. The new one fits them perfectly - super happy about that.5. The new arm straps are way more comfortable - super soft. (My wife is having issues with them though, more on that below)6. The new dividers are fantastic and completely removable and relocatable. That was a gripe with the old one, that divider in the middle wasnt able to be relocated.7. The bottom of the backpacks seem to be majorly reinforced. Theres a lot more padding - super happy for that.8. THEY DONT TIP OVER. I cant stress how much joy this brings me. No more propping then against walls._______The bad:1. On my wifes 25L(V2), the accessory pocket doesnt open completely, its been designed to work almost like a sleeve, its not very practical. Im unsure why theyve decided to design it like that - neither of the accessory sleeves on my 35L do that.2. I love the theyve enclosed the battery pockets with the indicator in a zippable sleeve. However, again, it doesnt open all the way. This makes it sort of difficult to add/remove batteries from that far corner. (You can see what I mean in the picture.)3. The new handle is on a weird side. Super small gripe, but it would have been nice to have that handle on the side that would actually need to be facing up should you set it on the ground. Not sure what the logic was with this (maybe to avoid setting the backpack in a tripod thats in the side sleeve?)4. The strap management drives me crazy. It was the same with the V1, aside from using a rubber band, the straps will always come lose and just wave in the wind. Thats been a pet peeve of mine.5. The width of the shoulder straps are pretty wide, my wife is pretty small, and they dig into her armpits a bit. We may end up returning hers over this. She didnt have that issue with the original. Im an average height dude, theyre super comfortable for me.6. The portable packs top now opens against the body when used as a Fanny pack - it used to open away. This makes it more difficult to keep open and just generally use.