SANS DIEU RIEN  This is a great product that will satisfy those who hunger for number puzzles. The four main puzzles showcased at three levels of difficulty are: Sudoku (9X9 grid), Kakuro (8X8, 10X10, 10X12, 12X14), Futoshiki (5X5, 7X7, 9X9), and Hexagons (9X9, 11X13).

Amigos Number Puzzle shines with its print option. ANP has the ability to create one or multiple boards per sheet of one type of number puzzle, with further options to print complete solutions, or include the answers you have already started. I've already printed some puzzles for the family to join in the fun!

There is a save and load option; however, I can't find an option where I can input a puzzle from another source to solve. I'm sure from such a responsive developer, that this is sure to be a future feature.

Because of the developer's quick response, I went ahead and purchased Amigos Number Puzzle for only $15.

Again, there is no snazzy music or graphics here--just unlimited puzzles to be solved!   
(Version 1.0.1)

SANS DIEU RIEN  I just contacted the developer yesterday, and he responded today! It looks like the developer is serious about his product, "I may in the future add player stats to the program, although I am not sure when that feature will be added."

For four number puzzles of various sizes, unlimited puzzles, print and save options, unique solutions, and a very responsive developer as well, in my opinion, Amigos Number Puzzles is worth the $15!  
(Version 1.0.1)

SANS DIEU RIEN  No music, nor glitz. This is an awesome deal as this program contains four popular number puzzles: Sudoku, Kakuro (Cross Sums), Futoshiki, and Hexagons-all in various sizes! You can also input other puzzles as well from newspapers, etc. Yes, there is even a save file option!

The layout is drab, but gets the job done. I only wish the author had a way to integrate stats and players' high scores. Otherwise, I'm not sure as to why there is a timer.  
(Version 1.0.1)