I really like it but it's definitely not a game for everyone. If you enjoy this style of game then I say grab it. I've never played the wizardry games but from what I've read they can be very difficult, Grimrock isn't too hard but it's also not a cakewalk either.
Phenom II X4 960T | 8GB Mushkin Silverline | XFX HD 6850 Add me on BC2 & BF3: xEverdred
Atmospheric and great fun finding secrets. The combat is lame for the most part but it can be satisfying. I enjoyed it and finished it. I'm not sure I'd want to play another game similar to it for a while but it was a breath of fresh moldy air.