I am a very enthusiastic Harry Potter fan and when I saw this, I really wanted it, so I bought it. It seemed a good game, casting spells etc. But, then it started getting repetitive, finding the DA members and doing something for them. OOTP is all about rebellion of students against the MoM and Lord Voldemort, this seemed pathetically childish and nowhere near rebellious.
The only good bit is duelling, but then that gets excruciatingly boring. It probably would have been worth it IF they had put in an online function. Duels with about five people in would be well worth £30. Sadly, EA have disappointed.
Don't get it for this system anyway, I read that other systems have a much wider game which includes minigames such as gobstones (which is mentioned in the books but is never really played in it). People moan about PSP being a port of other consoles, even for new games, they want something different and we do, they take stuff out. A game should be the same for every system it is made on except for the graphics, otherwise it is NOT the same game and should NOT be named the same.