Played about 30 min of MP and 45 min of SP...liking it so far. The MP seemed a bit janky to me, I think there was some definite lag, but it was OK, its not going to win any awards, but its fine.
Although I wish, given it was made by another studio, it had some extra polish.
I definitely see what the reviews meant by "it doesn't have quite the same feel." Same go for the graphics...like others have said, and before I had actually seen the game in action, it does look a little aged...they look good, but aged.
I'll agree with that other poster here, while Mass Effect 2 does not have "incredible" graphics, they are much sharper than BS2.