10 years in,
I bought my bottle in 2015. The bottle has continued to serve me well as my primary water bottle despite many dents on the bottom from being dropped. The O-Ring has survived well, but is quite stained from years of use (mainly coffee). Super durable and great for being able to boil water in a campfire (use gloves and loosen the cap). Wide mouth is narrow enough to drink easily and wide enough to clean. Only slightly heavier than a plastic bottle of similar size. I've gotten my money's worth and I expect to get another 10 years of daily use out of it.
Downsides:
The strap ring on the Ti lid lasted about a year before the welded tabs broke off from metal fatigue.
It took about 6 months for the threads to work themselves smooth so that it'd no longer squeak when opening and closing.
P.s.
Custom color pattern from blow torch.