[M]artin, if you ever played any GRAW games, you'd know they over do the blooms and this PSP title is no different (but it _does_ cover up those unsightly polygons)
I was playing it awhile ago, it isn't too bad (well most FPS's on the PSP are crappy in its own right), but it's definitely a step up from the last Rainbow Six title on the PSP.
For those still using the 3.40 OE firmware (like me), you have to disable the NO-UMD feature and use a real UMD.