I bought this for my dad to use as a HTPC and some basic e-mail and surfing. I wanted a box without a pre-installed OS because I had an extra Windows 7 licence and because manufacturers install so much extra rubbish with preinstalled versions of windows. I bought the barebones version rather than the plus because I wanted a bigger hard disk and more RAM. My experience with the installation was very similar to Martin Baines (see his review). I agree that 4Gb of RAM and 64 bit windows is the way to go. Installing the hard disk and RAM was extremely easy (and I'm not a technical person). I also encountered the "install USB drivers" message while installing Windows. There are 2 USB2 ports and 2 USB3 ports, but it appears the Windows 7 installation CD doesn't have USB3 drivers so installation must be done via a USB2 connected device. I have a wireless keyboard & mouse that use a singe USB2 receiver so that left one USB2 port available for installing the OS. I don't have an external DVD drive so I used "Windows 7 USB/DVD Download Tool" (available for free from Microsoft's website) to create an install disk on an SD card in a USB card reader (can also use a USB flash disk but I didn't have a big enough (>4Gb) flash drive). I then installed Windows without problems from the USB SD card reader connected to the USB2 port.
I'm very happy with the box. I loaded it with XBMC and filled the hard drive with Dad's favourite TV shows and it works like a charm. The 1.6 GHz E-350 is not fast by today's standards but good enough for a HTPC with 720p video files. I'm also very happy with the low noise levels. In short, it delivers exactly what it promises.