Feedback welcome! I wanted something more portable than my Corsair 800D, so I built this primarily as a gaming machine that could handle anything else I needed. My focus was on quiet operation and power efficiency as well as being as "future proof" as possible. I wanted a machine that will last me 4-5 years with as little upgrading as possible. Also my first build including an SSD, it's been a great experience. Installation in the Prodigy was incredibly intricate. It took me about two days to get it to boot. I originally ordered the Corsair HX series 750W power supply, but it didn't fit in the case. I returned it to Newegg and picked up the CX600M from BestBuy (Couldn't wait for shipping). The 750 was a little overkill, but it was a free upgrade from the 650 on Newegg. So far, I'm pretty happy with the CX600, but I ran into some problems during my initial build. Every time I would connect a drive to a specific modular connector on the PS, it wouldn't boot. It took me a long time to figure out the problem. Also, my Archgon external drive (cheap on NE) would boot into the windows installer, but told me it needed a driver to continue the installation (driver disk not included or possibly lost in the unpacking). I had to hook up an internal drive to get Windows 8 installed (second attached pic) . After that, my external worked fine.
The bottom line for my experience with mITX Haswell is that it's a real pain to set up, but once you get everything wired, it runs like a dream. So far it's not running noticeably hotter than Sandy or Ivy Bridge systems, but I haven't had the chance to load test it yet. I'll post my CPU and GPU temps soon.
Motherboard link (not listed on PCPP): http://www.newegg.com/Product/Product.aspx?Item=N82E16813188132