I have always enjoyed playing sudoku in my spare time and this app just makes it even better. Yes i like sudoku, but i favor this one over the others. Its the small features that really attract me to this app. Like High scores or statistics. i really enjoy statistics because it helps know where Im at and tells how fast i have to be to beat my score. But my favorite feature has to be the resume option. Even when you close down the app or shut the device down, you can resume your game. So when your battery goes down and it shuts down, you can just resume after, it doesnt erase your progress!