My problem with hidden away or compartmentalized PSU's is the extra length you need on your PSU cables. I have an Antec P182 which I think is a super midi case, it has a compartmentalized PSU house and my cables are REALLY! stretched to reach their sockets, especially the CPU lead which actually runs over the motherboard and under my GPU on the left side. Really what I need is PSU extending cables, especially as I want a new, larger case, big enough I can sleep in.
This Phanteks looks like the PSU is behind the motherboard tray? that's pretty cool. So all the PSU cables don't have to stretch the length of the case.
Will keep an eye out for this case when I come to buy.