Yeah, now I finally beat the game I could give more input on this. Whoever said just finish the enemy instead of triggering button press sequence was correct. At first I thought you "have" to use the circle sequence, guess not.
Anyways, the game is great. Worth owning, not sure if at full price (50) though. Replay value not that high for me, but it's a master piece of action advanture/platformer. Nothing beats it so far imo for same category on current ps2 releases. Great FMV , great music, absolutly stunning level design. Very good trick/puzzle, although some of the puzzle is extremely annoying, that might kill you more than 50 times in a row - or I am just not good at this game. Overall, you can tell thsi game is definitely well designed and SCEA did a good job on it. And yes, imho this game beats PoP based on it's fighting and Boss enemy design.