Ok, I'll be honest. Heavy Gear and Battletech. I am a Battletech guy. I love my Atlases, and Warlords (and yes, I know they're really, really similar), and I think Awesomes are awesome. I consider a PPC a standard side-arm. I didn't really know anything about Heavy Gear until a few years ago, so I always think in terms of 'Mechs and stuff like that, and a lot of Heavy Gear stuff feels alien to me (who would fight in hand-to-hand combat?). That said, I love both games. Don't find a conflict between them (Battletech being the grungy military knock-down-drag-out style game, and Heavy Gear being more like a guns and glory action-movie game). I especially love the arenas in 'em, be it on Solaris VII or Terra Nova. So when I find a game based entirely on an arena? I'm a happy, happy man.
More seriously, the art's cool, the setting's fun, there's simple, fun, easy rules that allow a focus on gameplay, the combo system just makes sense, and there's no reason to avoid this. If you want a quick arena fighting game for your giant robots, you can get this, or if you want a game with long-term management and decision, you can get this. There's no substitute for quick, fast, exciting Gear action!
For $18, this has to be one of the best games I've seen.