I've put about 3 hours into this, so I feel pretty confident about making a statement about the game as a whole. It's a pretty good game, doesn't necessarily tread in new ground [lots of cues from Mass Effect and Euro-RPGs like Risen and The Witcher], but it pulls it off pretty well for what's essentially an XBLA game.
Everything's pretty competent technically, there's no horrible glitches or confusion menus or rampant bugs to contend with. The combat is fairly smooth and offers enough variety in skills and attacks that it gets the job done. Enemy variety is a little on the low side, though, just three different types so far. The UI is minimalistic and offers just the necessary information depending on the situation. The menus are easy to navigate, understand, and use. All weapons and armor can be upgraded with materials that you find lying around.
Graphics are okay, not the greatest ever but certainly not bad. The art style is about what you'd expect if somebody mashed up Fallout and Red Faction. It gets the job done, and at least the graphics are clean and represent a consistent style that works with the setting.
The real downside here is that voice acting ranges from bad to merely serviceable, and the writing is sometimes awkwardly translated. Neither are ever gratingly terrible, but you're not going to get Mass Effect levels of polish in this regard, so set expectations accordingly.
The story is fairly interesting, and a departure from what you generally get in RPGs like this. In the game, you're a prisoner of war that's been thrown into a derelict prison camp. Your goal is to figure out a way to escape, making use of everyone around you to get the supplies you need. A nice change of pace from the traditional "save the world" or "save the girl" stories these games usually have. And, hey, it's all on some crazy, war torn Martian future, so you got that, too.
It's not a big, expansive RPG, but it's the sort of game that's my cocaine, so I am very happy with my impulse purchase on this one.