Well, I've played through a few levels now...so far, it's pretty good. The biggest thing I can say against it is what all the other people have said as a gripe: no mid-level checkpoints. The game also can get really cheap in some sections. For example, I was fighting a mini-boss who fires continuous streams of lasers in varying patterns that hold for a few seconds, and then switch to a new pattern. This was fine, until they started sending out peons to attack me while I was doing this, who are immune to gunfire, and they can freely walk through the lasers. So, to get them to stop shredding you from the sides while you dodge lasers, you need to attack them with a melee attack, but once you initiate the attack, you're stuck going through the animation, at which point your character has moved in front of the laser blasts...rinse, and repeat. Things like that can be a real drag, but otherwise, I'm having a lot of fun with it.