It's ok, doesn't live up to expectations thought especially in length.
What..?
Man, I know your a Sony fanboy, but how could you say that?
Its about a 30 hour + sidequest time romp, which is a good length (short and sweet is almost always better than long and carried out (see: Final Fantasy XII...so long I almost didn't finish teh game cause uh....wow.)) for an RPG, the graphics are the best on the 360, the story is amazingly well crafted and told, the sound and music is all superb and draw you into the areas + fights, and the framerate is solid, if lacking in certain parts of the game, but still better than KotOR was.
I mean, yeah, its no Planescape: Torment when it comes to story, drawing you in, sound, music, or even depth when it comes to your character's developement imo, but its still a very fine Bioware original game, that stands on its own two feet. The game gives you enough to get you into the series, but doesn't give you so much as to bore you, and not too little to throw you away. It gives you the exact right amount of content to basically get you going "dayamn....I can't wait for the next one!".
Really, the only downside is that you can't interrupt conversations like you were supposed to, and a couple of things they said would be in aren't. But thats how game design works, and it happens all the time. Mass Effect is still the best RPG this year so far though!