I expect I'll catch this in a few years, when it's free to stream on either Netflix or Amazon Prime and I need some background noise on a Saturday afternoon while housecleaning - it kind of strikes me as that kind of film.
As for giant robots...I liked Evangelion immensely, but that was actually a drama series with a dysfunction junction cast of characters, themes of syncretic mysticism, (possibly) old conspiracies, and occasionally esoteric existentialism that just happened to have giant robots fighting Lovecraftian aliens as a framing device.
This film, however, seems to star...Fantastic Special Effects! Oh, and I think there were some people in it, too, but they didn't look that important. At least that's the impression I got from the trailer I saw.