I picked this up on the MAS shortly after it released, as always with a Feral job it's great, runs great on both my MBP 2011 and nMP. Already own it on PS3 but I like it enough to double-dip and it looks wonderful in 2560x1440.
Also wants to give special note to the perfect controller support. I use a Logitech F710 and it just works with no problems whatsoever. Of course this is standard for Feral games at this point, but I wanted to highlight it here because I've played a lot of Mac games lately from other devs which have had either no support for this controller or broken button mappings with no easy way to fix so it's much appreciated, especially for a game like this where a controller is basically a must-have.
Nice surprise too is Game Center support for achievements and leaderboards, cherry on top if you will.