For me, this is such a great design. You can just leave the bottle in the open position while riding, and it won't spill out, yet you can still drink from it with a little squeeze. One less distraction to worry about while riding.
Comparing this to prior version i miss the waist where one can get a good grip on the bottle. When putting it back in cage that is a helpful feature to know you are close to the top of the bottle. Otherwise nice smooth screwcap and pliable sdes.
This bottle is an improvement over run of the mill water bottles because there's zero chemical aftertaste (even when leaving water in the bottle overnight), and you can leave the nozzle open but not have water leak out even when turned upside down. No issues fitting in my standard size cage. Great bottle.
I've been using CamelBak bottles for a while, and I feel they're the best ones I have. I've used many others, but the spouts on these by far are the easiest to use because you don't have to close them every time you put your bottle away.
I bought this item since I like the quality of camelback bottles, this newer model has a removable valve for cleaning.
I also appreciate the transparent plastic case which let you check the filling level.
My only remarks is that it is a little too tight on my water bottles.