If you want a 5-6 hour action game with an extra strategy game included, this is the one to pick
For the game to match with the PSP engine's capability, the free-roaming environments had been completely removed. All the SAME missions were kept within the game though so your not gunna really miss much but the driving missions that were in the PSP had all been cut out and just replaced with cutscenes instead, and I personally thought it made the game easier and also shorter than the PS2 version.
I had mixed reactions after playing the game but generally I was happy with the overall package the game offered.
Graphics:
They manage to look like the PS2 version except less sharper but still looks great on the PSP screen. Thank god the character modification bit is still available.
Presentation:
Very good, all neatly layed out on the screen. The HUD looks very attractive and all the text is visible.
Violence:
Minimum, not as much as the console versions.