Good horror game
Dementium makes good use of the DS abilities with tight, responsive controls (better than Metroid). The game isn't action-packed, but oozes atmosphere which is greatly helped by fantastic graphics and sound.

However, the levels are very repetitive and frequent viewing of the map is necessary. Sadly, you can't label the map although there is a notebook for taking down clues.

Additional complaints are that, unless you really enjoy the game, you probably wont replay it once you finish. Completion will take about 8 hours (not including deaths or puzzle problems)

If you like the sound of a horror game on DS and have/dislike Resident Evil/Bio-hazard, consider this game as a worthwhile purchase.