I've owned one of these for several months now. I used it to replace an ancient desktop. It handles office tasks, software development, internet browsing and the occasional video, with ease. I'm not a games player, so can't vouch for its abilities in that department. The model I received came with an American keyboard. I ordered a new Logitech USB UK keyboard, but it had a few problems with that, so I simply went back to my old UK PS2 keyboard. Apart from that little glitch I've had no problems with it.
Windows XP comes pre-installed with a recovery partition in case of difficulties. You have to make your own recovery DVDs if you don't want to rely on the recovery partition. Documentation is minimal. I haven't even been able to open the case so far as there are no instructions on how to do it. The 1GB RAM 160GB HD seem to be coping so far, so no immediate need to upgrade it.
This machine does pretty much everything that I need it to do. It's small, low power and virtually silent. It's got 6 USB ports, wired and wireless internet and an SD card reader. You'll need an external DVD reader though. Provided your needs aren't too demanding it is a very cheap and usable desktop replacement.