Very large 'midi' case, especially the width, which will eat even the largest cooler (e.g. Dark Rock Advanced for instance). Plenty of room to work, and more fan cooling than you would even need (3 fans fitted, space for too many more). The fan controller is not very impressive, since wiring the fans to it neatly is a challenge (it fits in a backplate slot, rather than front or top of the case). Lots of opportunity to hide other wiring behind the motherboard, especially if you are not fitting water cooling.
Apart from that, no complaints .. pretty quiet, good airflow, and well built. I was previously a Lian-li case fan, but this is (IMO) as good and cheaper.
I personally hate front doors on computers, but if you prefer 'even quieter, with a door' (and worse airflow, and a PITA when using the CD drives) then the fractal R3 looks equally good.