It seems to split the people at the Watch, more or less. Those who prefer rather "old school" RPGs, don' like it that much, but everyone agrees that it is a good action game. And that it is more movie than RPG, and more shooter than RPG.
The ending (about which I know nothing substancial yet) has provoked a lot of reactions, even on web sites. Same goes for the multiplayer part.
Metacritic appears to get a lot of anti-ME-hate or anti-Bioware-hate because of ... whatever. People post 0-1 points there just to beat them, and as the "review text" they sometimes write even utter gibberish (yes, someone quoted even an "Lorem Ipsum" entry ...).