This is how many people would want to see Hogwarts, but the A.I. and the lame story make the game quite a bummer.
Really cool and good looking environment.
Fun to explore and find all achievements. Realistic amounts of people (Though for some reason they are all the same height exept for the key-characters. Which makes the first-year students look like 5th-years as well).
Fun mini-games and puzzles to complete.
Fun duels against Slytherins.
Fun things to discover that happened in the previous film and/or books (like a gargoyle telling you his friend got thrown down the bridge, because of a boy being chased by a dragon).
It also is really good that they put a difficulty rating in the game, this makes it way more challenging.
The Bad:
Stupid A.I... I mean really, you nearly always get stuck on walls, because Ron and Hermione won't move.
Quite difficult controls (For example while using Wingardium Leviosa. When you try and move objects with your mouse, you'll soon quit and curse the game).
Also walking around with the mouse is a no-go, it's really confusing and annoying. The characters look a bit... off, they quite look like the real people, but a bit more effort in them would have done the trick.
Moaning Myrtle who keeps telling you you've unlocked new frikking things in her little room.
A lot of cut-scenes that you can't skip through.
Overall:
The game is fun to play for at least one time, though biting through the extremely disappointing story line might be a bit of a struggle. But for the people who just want to explore Hogwarts and beat the living $h!t out of Slytherins, THIS IS THE GAME FOR YOU:D