FWIW I built a little calculator project using Vue and Vuetify this summer and I really liked Vue's easy-to-run-with feel, but I couldn't jibe with how difficult Vuetify was to customize. Maybe I wasn't reading the docs correctly, or maybe it was my concurrent learning of Vue that made Vuetify seem obtuse, but I just found the whole experience frustrating. My god was the result pretty though. 7/10 would star on GitHub.
Yeah, I struggled with Vuetify a bit too. It looks nice, but I think a lot of the props could use more explanation and examples. The guy behind it recently announced that he'll be working on it full-time though, so I think it'll just continue to get better. Vue's super easy though. I've really enjoyed working with it so far.