I just saw it, absolutely loved it! I was surprised, I was mainly seeing it because I wanted to see a movie and it was playing. Plus, I still like 3D movies and this was the only one playing in my area. I had seen the trailers, but I honestly didn't think much of it, wasn't looking forward to it or anything, and didn't really think it was going to be very good. But I'm glad I was wrong! Really fun, great action and comedy, but also had a sweet side to it. It definitely evokes other movies like The Lego Movie, Tron, Ready Player One, and the Matrix, to name a few that popped into my head. If you play video games,, especially GTA, you'll get more out of it than someone who doesn't play. The cast was great as well (I've yet to see something with Taika Waititi in it where he isn't great).
A side note on the 3D, I'd say it was good, and I'm glad I saw it in 3D, but it lacked some "pop" factor for me.
Anyway, I highly recommend seeing it, especially in the theater, if you can.