Strong points:
Funny, detailed characters who show their emotions really well
Very Detailed
Addictive, just one more level kind of game
Some 1/2 hour long levels mean you can fit the game in to a bus journey
Collecting the gems and ghosts is fun
Looks amazing
Puzzles are inventive
The Poltergust 5000 is just brilliant
Boo fights are amazing and challenging
Weak Points:
Can get repetitive
Having to start at the beginning of the mansion each time you start a level means it takes ages to get to the part you need to get to
Ghost fights are easy and repetitive
Controls are difficult to get used to