I liked it*, and probably a bit more after having slept on it.
I have a few complaints:
Some of the CG didn’t look good, though (Bruce floating in the Hulk Mech). I also wish they had used less CG on Thanos, his CG just didn’t work for me. I think Brolin did a great job, though. At first I thought he looked a bit different after he got the second stone, and I hoped he would end up as less and less CG and more and more make-up and prosthetics as he got more stones.
Thanos’ henchmen were really cool, especially the one with horns and the goblin one. I got the impression those were less CG.
My favorite scene was probably when the Guardians pick up Thor in the beginning.
*=