...so far, there are a few reviews in and they seem largely positive.
Guardians of the Galaxy Reviews!
I am going by what is showing up on RT.com, of course. I will be honest, that first trailer didn't grab me like it did a lot of people. There are two friends that I hang out with often and out of the three of us, only one guy really loved it from the first trailer. He also thought X-Men: Days of Future Past was going to be awesome, while I thought it was going to be a mess.
Chime in.