I've had one 6 months now, and although a few teething probs mainly surrounding the SP2 which they have fully resolved and won't affect you as it will come pre-installed (mine came SP1), my PC i working great and doing evrything I wanted it to and at a decent price.
I had one other minor issue with Pinnacle Instant CD/DVD, but removed that and all is fine and dandy. When I did have to ring them they answered the phone in reasonable time and provided sound advice. There is no doubting that their computers are good value. It seems that software issue cause alot of their problems.
There may have been quite alot of rumblings on here and other forums about them, but there are alot of happy customers too. Remember, Only the bad things ever get reported!