I've always found it difficult to get into this genre of game. The controls have been a fiddle, the game mechanics have been clunky, or the puzzles have been unfair.
Stonekeep has been easy to pick up and play, and has a vitality that sucks you in. I found an hour of play time passed without me noticing!
I would seriousy recommend this title to anybody who might have dismissed this genre in the past in favour of more action orientated titles .... its great!