The concept is good but...
the Dynasty Warriors for psp have the same sense of addiction but the game play make it a little boring with the time and the lack of other modes (only two??...) the game is a death end.
the geometry of the characters is very good and detailed but the textures are very low-res but the effects are very good. the sound is a really good part of the game and the quality is very good (with the headphone or the speakers).
the frame rate is very solid but in case the frame rate drop's because the great number of enemies in screen (ok, no so much enemies but a good number..), and the ai of the enemies are very week.
Dynasty Warriors for psp is a good game and if you want it first rent it and you will decide if you like it or not.