Microwave refers to the size not the heat. Its actually keeps the lowest idle and load temps out of any PC I have made. While I love the case and the options it is a little big. I also wanted something that would put the motherboard on its side with water cooling only hanging over the board. I am neurotic and at all times fear my water cooling will leak so I would rather it kill the board than the GPU.
Its amazingly quiet, great airflow, and great benchmarks. All I need now is a nicer monitor with g-sync and I will be all done.
Great Case with a ton of customization options. It will fit pretty much everything you want to put in it, along with more fans than you know what to do with. Its allows for tower and sideways builds. It does feel a little cheap and is a little on the larger side but my favorite case that I have owned.