This game is awesome :-)
I recently purchased this game, and have found i'm unable to put it down ever since.
The improvement of being able to capture previous games and regions Pokemon (e.g. Mareep) was an unexpected bonus, and its added more variety for the game.
If you've played Black/White previous, it's a trip down memory lane with characters you recognize from the two years before (such as Bianca); and even if you haven't played the previous version its still a great play :)