The case is, IMHO one of the best and quietest cases out there. I have one and I have another Fractal case that's slightly smaller.
I personally don't like fans on the bottom that suck air from newr the floor, but the case does have a dust filter, so it should be less of a concern. The other issue with the bottom fan mounts is that sometimes a longer PSU blocks the mounting points - that happened to me.
Bit, since I don't like to use it, small loss.
I have two fans in the front, one (with my AIO radiator_ rxhasting on the back and one venting to the top. There is space for a 2nd at the top, but I don't need it and the case is cool.
I took out the Fractal fans since they are 3 pin and need the fractal fan controller that I also don't like and replaced them with 4-pin PWm fans in the Cougar Vortex line. Works like a charm.