The new games are one of the best Pokemon games ever, in my opinion.
What I loved about them was the great diversity of available Pokemon from other regions. Most of the trainers/gyms weren't too easy but I'd say, the champion could have been a little tougher.
Besides, there's so much to do, I get the feeling, the games will never get old :D To me, Black 2/White 2 are a lot better than their prequels. The Unova region is so beautiful and gigantic! :D