It's terrific. A great turn-based fantasy battle system with lots of flavor. There are issues: the documentation is poor, but I was able to figure out most things by glancing around the forums and the wiki. The UI needs a lot of work--not everything is clear and some things are more frustrating to accomplish than they should be, and the AI isn't amazing but comparatively, I don't think it's terrible. And besides, when is computer game AI ever really amazing?
Nevertheless, it's great. The random maps mean every gaming experience is different, so there's lots of replay-ability, the monster spawns are a nice wrinkle, and when a huge battle gets into swing, it's a lot of fun. A very addictive game. I've played five very long games (all 200+ turns) and I keep coming back for more.