The developer is awesome and releases an update (mostly) every week. It made it through Steam Greenlight but hasn't been released there yet. It is well worth the 8 bucks.
As a person who hates repeating himself, my biggest problem with DF and its difficulty curve was that I often would make a small mistake early in the game, like expand too fast or forget to close off an entrance to a cavern, and have to start all over, and repeat the same X steps to get a basic civilization going, which gets tiresome. Gnomoria is no different, but it is much more forgiving in the early going and leads to fewer short-order restarts. Also, graphics!