Saw it in IMAX and thought it was great tbh, definitely what I expected.
Biggest complaints I've heard so far are:
a) Lack of Godzilla
b) ty characters
I agree with b but disagree with a. I thought the characters outside of Cranston were dull and did nothing to add to the film, though some of the non-Godzilla scenes were dope as (halo jump, train scene).
As far as the lack of Godzilla, there's really only so much he can do. He's not Batman, and I can only watch so much of Godzilla destroying a city or fighting another monster. I thought the Godzilla scenes were really well done, even the teaser parts. Plus, the final battle and finishing moves were well worth the lack of Godzilla throughout the movie.