For gaming and general-purpose computering, also some development here and there for me. Built two of these, one for me, one for the wife. My computer was one of the original Athlon dual-cores, hers was an aging/dying laptop, so we both needed something new. She had never moved her laptop since we moved, so we got a desktop. Her desk is fairly small though, so we got an ITX. I originally wanted something with a smaller footprint, like the FT03 mini, but the cost of that (and associated things like PSU and slim slot-loading BD burner) was too high overall. So, this is still a smaller footprint than (most) micro-ATX builds, and shorter as well, which she liked.
No real problems, but getting everything in the case was very tight. The Seidon cooler had some minor gripes - the standoffs weren't indicated in the instructions that they have a mobo-side and a non-mobo side. Maybe this is common knowledge but I haven't built anything in a long time and hadn't come across it. The rubber grommets on the fans to the radiators contacted the fan in one instance, so I had to jury-rig pull it out of the way so it didn't make a horrible noise.
I added temps I've found to this build - these are with fan speeds set to their quietest setting, I can keep temps lower if I crank the fans. Overall case noise is fairly quiet, but definitely not anywhere near silent. I don't mind a little background noise, my typing on the keyboard is far louder.