If the trailers temp you on the possibility of Robots punching out Monsters, then you will not be disappointed!
This movie is what a live-action anime should look and feel like. It gets the characters in and out as quickly as possible so that they can set the stage and the battlefields. Other "Summer Blockbuster" movies tend to promise action and then somewhat deliver (usually the stuff from the trailers is 50% of the action already), But in PacRim, you're going to get action and badassery. This is what Transformers SHOULD of been and what the Halo movie HOPFULLY can provide.
Now, a fair bit of warning: The acting is ok. Personally think that the actors did really well with the type of script provided but it's going to be cheesy due to the material that the human element needs to fit into all of this. There might be some slow part and groners in the first 40 minutes, but after that bump, It's beat-um-up time in it's finest.
Seriously though, As a person who loves geek culture (Gaming, TableTop, Fandom) PacRim has earned a special place in my heart, one that I'll undoubtedly come back to over and over again in many years. Also, That theme song is the greatest. Try doing something mundane when that theme plays, and watch how it becomes THE MOST IMPORTANT THING YOU'LL DO THAT DAY.
GG,GL,HF
Pros well paced, great story, robots, gets the cheesy stuff out of the way quickly., punching monsters in the face., battlefront locations meets and exceeds needs.
Cons humans, plot needs cheesy human story., not enough punching monsters in the face.