They are amazing. My wife and I own 4, (2 40oz big bottles, 1 20oz coffee mug, 1 64oz growler) and love them to death.
Worth what they cost for sure. I haven't taken mine /out/ yet, but it has handled being dropped on concrete (twice) like a champ.
Planning on buying myself a small 12oz or 16oz one for coffee soon. Also eyeballing their new pint glass, though it's really pricey.