Flawless! No doubt PACIFIC RIM was the best sci-fi / action movie of 2013. The plot have a perfect balance between action, special effects, fun and drama. Even for those who are not followers of sci-fi, it holds the attention up to the point to shout a "[i]it is pretty cool![/i]" at the end of the movie.
About the motion picture itself: The robots and monsters are very unique, the soundtrack is amazing, the actors in their characters are perfects and the special effects are awesome, made so carefully that you can see / understand / tell exactly what is happening during the fight scenes.
If I had to point some issues: The raising of the "kaijus" (monsters) on our planet and all the stuff about how the connection between man and the giant robots (Jaegers) is made... All of this should have been told slowly, for the audiences' better comprehension and delight.
But... The movie is so awesome that I watched three times in the theaters and then I could undestand everything perfectly!