I used a Compro U100 Vista ready (with MCE remote) one for about 2 months, picture was great, picked up most of the freeview channels, the only thing is the little antenna that comes with it is a bit crap (unless your signal strenght is insanely good).
Only reason im not using now is due being a little heavy handed with it and breaking the USB connector on the stick so im now using an internal pci card.