1. The touch pad is a little TOO sensitive: more often than not a letter gets printed twice when I tap it with the stylus, which results in a large amount of backspacing.
2. When you are in the lower half of a 21x21 puzzle, you can no longer go to a particular square by tapping the square -- it goes to the square that had been in the place tapped when the top half of the puzzle was showing on the screen. I do not like having to maneuver to the place I want to go with the arrow keys.