I started playing Pokemon from the first generation. And I decided to continue playing in order of generation. And I replayed two Kanto games, one Johto game, as well as the Unova sequels. When I finally got to playing Pokemon X for the first time, I couldn't believe the change from 2D to 3D.
It's a great game better than most of the games before it. The only thing I noticed is that it is significantly easier than a lot of the games before it. Also, there is not much to do in the post-game. Once you finish the main story and elite four, there actually isn't a lot to do.
Other than that, it is a fantastic game.