I got it mostly for Greed: Black Border; I felt like a nice relaxing hack'n'slash, and the sci-fi setting is a good change of pace.
The inventory system is a bit minimal -- more armor slots = more fun, devs -- but the skill system seems pretty satisfying. My feeling is that the game is definitely more than worth the couple of bucks I figure I paid for it. (got the bundle for this and Grotesque Tactics.) And there's a multiplayer option which I haven't explored at all. Might just be worth a look...
I'm just getting through the first level, I'll post back if I play through a second level in this sitting.
update: Made it to the vendor, which definitely adds something to the experience. Extremely satisfying couple of bucks, IMHO.