It plays a good game of sudoku, but it's let down dreadfully by the appalling input method, trying to use the write option is frustrating to say the least, a 4 with be recognised as an 8, 9 a 5, as an 8...
The only ones it recognises is 7, 1, 2, 3 & occasionally 6!
You do have the alternative method which is a lot easier to use.
Buy this if you like frustrating input methods, avoid if you don't.
It would have had 4 stars if it wasn't for the frustrating input methods!