I use their lower-power power supply and it simply works out of the box and is stable. I can't say anything about their higher end boards, but they have rather positive user rating in their aliexpress shop.
There is also kind of review available in german forum...
Lian Li launches (somewhat bigger) solution that has some similar ideas as your case:
http://www.lian-li.com/en/dt_portfolio/pc-o5/
https://www.youtube.com/watch?v=ucNne8-yc5w
http://www.techspot.com/review/930-lianli-pc-o5s/