We've been using Vue in production since Vue 0.12. It was a joy to use way back when, and it's only gotten better and better.
That's not to say that I haven't shot myself in the foot dozens of times in the process though. We've had to solve a lot of pain points from our original 0.12 code (two-way binding, too many props in components, some jquery dotted in, lots and lots of pre es6 code). But even sitting on code I wrote that looking back makes me cringe, Vue is always enjoyable.
It has truly improved my daily quality of life and I owe Evan You a lot of gratitude.