It seems fine. I've only used it for one and a half days so far and it seems alright. Obviously I can't pass any comment on durability as yet but the rest of it functions like it says on the tin. I do like the easy adjustment for flow control. Other backpacks I've used have been lacking in that department. It allows me to be more frugal with water on maintenance cleans - quite important as it saves on heavy lifting with the containers. It won't matter so much when I get my van and tank back but at least I know I can work at maybe 80% capacity till that happens. I find I need to rest a bit more with the extra lifting.