There is no 'Complete' version of the game with the DLC. If you are looking at the DLC do not buy the Understone Quest pack. It is a waste of money. The Traitor's Keep Quest pack is pretty good.
The characters in this game are painful to watch... just awful character design. The combat is pretty good though. If you decide to pick this up turn on Japanese voices. The english dub will rape your ears. I am unfortunate to have the xbox version with only english voices :
If you have other versions but not the DLC don't bother with this. There are frequent minor bugs that get annoying after a while.
If you have never played ME but are interested I would recommend it at that price. Bugs aside, its a fanfuckingtastic game.
The ps3 version is way buggier than the other versions. Like other bioware games it is a bad port. I really hope they optimize me3 cause my pc is almost dead :(
I also have a love/hate thing for this game. I like the characters and the first halfish of the story. I really hate the reuse of environments. After 5 hours you have seen the whole game. Near the end I thought the shit hit the fan a little too quick. I really hope an expansion moves you out of...