The ridges are all rounded (at cheaper housings I always had small cuts on his fingers, when R3 is not), the HDD carrier have rubber dampers to avoid vibration, one comes very easier to get to everything, even to the huge CPU heatsink Scythe Mine 2 later to be installed on the board.
The air circulation is good, the insulation is super. Very practical, the USB ports and the power button front top of the cabinet.
The only catch: my power supply (650W Be Quiet P9) was larger than the space provided for this purpose, I had to develop a fan bracket and the air supply of the power supply is thus not on the designated housing opening. But that will probably more of a problem of power
