I built this machine for use as a web-development workhorse that I could easily transport from my remote home office into the actual "office" with ease. The big key items that I needed were: (1) linux support, (2) easy transportation/setup/taken down, and (3) needed to support a multiple monitor set up.
So far, it's worked like a charm and this is the first system that I've set up without running into any hardware/driver compatibility issues with Linux -- multiple monitor, built-in wireless, and even Ubuntu's 3D Gui/Open GL worked right out of the box without any system tweaking at all.
As for the build. I would highly advise taking out the power supply before seating the motherboard and not putting it back in until everything else is hooked up. I struggled trying to angle the screwdriver around the psu to screw down the motherboard until I realized that the psu was removable. Also, ASUS shortchanges you on the screws, but thankfully, I had quite a few spares sitting around. Overall though, I was hesitant about the Mini-ITX form factor because I thought putting together such a small system would be a pain-in-the-***. But the Sugo05 was about as spacious and easy to work in as a full-sized case.
I am not using a dedicated GPU for this system, but am rather relying on the Intel HD Graphics 4000 of the I5. So far, this seems more than enough to power two 24" monitors and Ubuntu's minor opengl gui. I have seen photos of builds that incorporate a dedicated GPU into this case, and quite frankly it bewilders me as to how they succeeded at fitting it in.
The promotional photos of the Sugo05 do not give the system's sleek design justice. It looks very practical in a work environment and it's small form-factor makes it easy to just set on top of the desk (versus having to crawl around underneath as is the case with my ATX systems).
Noise wise this case is noisier than my ATX case, but this could be because I have it sitting closer to me. The hard drive read/write cycle is also rather noisy and at this time I'm unsure of if this is because the hard drive itself is bad or if the case is amplifying the disc noise.
I'm using the stock cooler that comes with the i5. The idle temperatures are around 27f - 34f. I ran 4 threads of burnP6, which essentially runs each core at 100% usage for five minutes. During this run the temperature rose to 67f with a couple peaks into the 73f range.
The cost (at the time of purchase 5/1/2013) came out to $720 which would place this build roughly $150 less than the cost to go with a Shuttle and over $200 less than going with a Mac-Mini so I'm extremely pleased with the savings.