Every family needs a "Tile Lock Scrabble"--even if they already own the old version of the game.  The tile lock feature is very intuitive, but, at the same time, it makes all the difference for those playing the game.  The tile lock feature keeps the roles from sliding on the board.  So if you accidentally bump the board or want to hold it at an angle to visualize it differently, the tiles won't go sliding around.  This feature is worth its weight in gold if you have a youngster in the house who's prone to bumping the board.