I love this water bottle in general--but compared to some of my other bottles, it leaves a lot to be desired.
The lid is thin and not well insulated, so particularly cold water causes condensation on the top. The seal of the spout also isn't tight enough in the closed position, so if the bottle is tipped over in my bag it'll spill. Thankfully it's a slower leak, but it's still a leak. So with the condensation + leak, if you don't notice water pooled on the top and go for a sip, it'll get down the front of your shirt. (This happened with both the first lid I got and the replacement. Customer service is great though)
And sadly as cool as the 'lock in open position' feature is, the hard plastic of the lid means that it absolutely won't stand up to accidental drops. My first lid shattered on impact with hard carpet. Something flexible would be nice for v3.
This review is for the spout, but since I got the bottle as a gift I can't write a review on it. Will say though, the insulation on the bottle is unparalleled. Really love it!