The number and thickness of the cables are quite satisfactory:
It’s not a problem to lay them out neatly so that they didn’t hinder ventilation. There’s no shortage of vent openings, either. Besides the one in the top panel, there are two openings in the bottom, one more in the front panel above the HDD cage…
…and yet another one on the right, between the PSU and the optical drive cage:
There are also two grids in the side panels at the back of the case, one of which is meant for power supply cooling…
…and the other, to supply air to the graphics card. The grids are well-made, profiled and securely fastened:
The PSU vent grid works well, but the other grid will only do its job if there is only one add-on card in your system, i.e. the graphics card. If you add a TV-tuner and an audio card, the vent grid will just get blocked.
Ideally, there should have been one more vent opening in the front part of the side panel right above the hard drives cage.
The power supply is fastened through a special plate: