Great PSP game.
Although this game have comics style cut-scenes, the storyline of this game is great, just pay attention on the captions, and you will understand the whole story, the only thing you need is patience to read carefully what the characters say.
The graphics are great too, just like I said above, it's like play Metal Gear Solid 3 : Substance, and I think those graphics are pretty good, so this game have pretty good graphics too.
The sound effects, this reaches the same point as the graphics, just like the PS2 game sound effects, so they are great too.
Beyond of these characteristics, it's a fun game, that follows the good points of Metal Gear Solid 3, like the CQC movements, the third person-view (from the Substance version).
So resuming Metal Gear Solid : Portable Ops is an awesome game, and every REAL Metal Gear fan, will like it, and have to play it.