I played Baldur's Gate constantly on the PC and when this was announced I was expecting a game that drew me into that extent (I still go back to it today). In the short time I have had this it has not disappointed. I have not stopped playing it and already feel it is going to dominate the coming months.
I decided on the Xbox 360 version simply because that has become my gaming machine of choice. Now while people will constantly go on about the graphics not being as pretty as Mass Effect (which is true) or alot of other new titles out there it is not all about the graphics. The story so far has been great and I am enjoying the returning to the more tactical style of battles rather than shooting constantly like in Mass Effect.
If you are expecting a medieval Mass Effect/Action Game you should avoid this as you will be disappointed. If you are looking for a true role-playing game then this is the way to go.