Addicting and fun. I almost 4-starred due to lack of any type of game sounds, but I'm confident they will add some in a future update which would make this game complete. Great if you like sudoku. Also, I LOVE that it keeps your progress if you quit to start iTunes or get a call or anything. Very good.

A super companion game to you sudoku lovers. I so far have found all puzzles solvable with logic alone. Gave it only 4 stars due to a few additions I would like to see. As someone else has mentioned, game sounds would be nice (not absolutely necessary) but I do like a bit of feedback while I play. Second, the hi score system could be expanded. Currently, it only saves your best time for each of the three difficulty levels. I always want to see how much I beat my last time by when I complete a puzzle in new record time, but your last time is gone, only the new best, so unless you remember what your last time was, you're out of luck.There are numerous ways to improve here, but I suggest at least a top 5 or 10 at each difficulty plus a global board would be icing on the cake! A way to select a specific puzzle would be appreciated. Currently, you can only move to the next one, one at a time. Lastly, a more glorified "YOU WIN!" screen when you complete the puzzle. There should be more pizazz!!! All in all, a great game that is just a few steps from perfection.

I am a big fan of puzzles on iPhone and this one certainly meets the bar. Great little app to keep you busy.

Speed sudoku but with oddly placed squares? AND pretty colors? This game is definitely very nice, but the ability to turn off all sounds would be nice.

I really enjoy this game. I am a sudoku addict, and this is a great time-killer. Hated being called for my appointment, as I wanted to keep playing.