Honestly, probably exactly what you think it is if you've seen the trailers. And honestly, for me this wasn't a bad thing. This is a fun, check your brain at the door, monster brawl in the spirit of something like King Kong or Godzilla, though not as good as those. (from my understanding, its become the highest rated movie based on video game, so that's saying something at least) Surprisingly gory in parts for its pg13 rating (think Kong:Skull Island level of gore) it does feel they probably cut a few things out to secure that rating. The actors are all clearly having a blast with their roles and the monsters look pretty good. There is one sequence where it felt like the special effects budget ran out. If you;ve seen the trailer you've seen the part where the wolf leaps into the air and attacks a helicopter, which looks quite good in the film, but right after when the helicopter crashes into the side of a mountain then crashes and explodes.... It seriously looked like someone superimposed fire around it. That aside, everything else looked quite good. The film also had no qualms about putting everyone in the monsters path in peril. These monsters are out to attack everything in their path, so get out of the way or get smashed or eaten. Really only disappointment I can think from it is one of the monsters goes down quite anticlimactically, but that's a very small gripe given the rest of the film.

I couldn't help but think back to some of the old monster movies they would lampoon on Mystery Science Theater 3000. This felt exactly like those movies of old, just with much better looking special effects and a much bigger budget. Go and have a blast watching Chicago get leveled!