Picross DS review at Gamespot.

"Picross, short for picture crossword, is a puzzle not entirely unlike Sudoku, in that it forces you to use logic to deduce the particulars of the puzzle. But rather than focusing solely on numbers, Picross has you using numbers to determine which boxes in a grid get punched out to eventually form a picture or a pattern. With a ton of puzzles to keep veterans busy and a helpful tutorial mode to get new players up to speed, Picross DS is the sort of game that will keep you staring at your Nintendo DS long into the night."

Full Source: Gamespot