Better than the original
If you have played Megaman X on the SNES, then you know the feel of this game. Side-scrolling, platform action that is an action shooter where you kill robots. But here's where it differs from the original: all the upgrades have been replaced. The bosses and enemies have been given some new moves, and some of the levels have been given a redesign, making this "old" game feel fresh and new.
Graphics:
I really love what they did with the backgrounds, character models, and overall presentation. And the animated scenes are cool. The levels are all now 3-D, but still 2-D. Same with the characters and enemies.
Sound:
The voices are good and fitting for the characters, the SFX are still great, and the remixed music is rockin'.
Value:
For me = tons of replay. Plus, it's Megaman X. Who has only played through this game once and never touched it again?
Overall:
I believe the PSP version of X is better than the SNES version of the game. It's a port, yet a new game with better stuff. A must own for all PSP owners.