In terms of numbers and presentation, then, Crosspix competes with any book of Tsunami puzzles you might hope to buy for the same kind of price as you can download this game. There is one respect, however, in which it arguably compares poorly with the traditional pen-and-paper versions.
Rather than allowing you to get hopelessly entangled in the ramifications of an error, Crosspix gives you lives, removing one every time you try to fill in a square that shouldn't be filled. While this undoubtedly forestalls one kind of frustration, it also removes a dimension of the original's gameplay, which will either appeal to you or not depending on your orientation.
In any case, it's a small point, and one to which you shouldn't pay the slightest bit of attention if grids and numbers are your thing.
Audio/Visual - 7
Gameplay - 8
Value - 9
Innovation - 7