Harry Potter is awesome and this is no exception.
The graphics are good for a PS game and the spells and flashes are bright and ok. The peoples faces look a bit askew and mongy when up close but the graphics are well thought out and designed properly.
The sound is on queue and is never late. The spells and the speech is actually quite good. The gameplay is very good as well and the value is great. The price is very cheap since its a PS game and the game is well worth it.
Now, the only bad point. ITS TOO SHORT!! EA games should have made it a lot longer. I could complete it in a day thats why I put the time spent on the game at 10 hours or less. I completed it once and then I completed it again. IT SHOULD BE LONGER!!
Other than that, you should buy it. Its great and cheap and very interesting.