I have just tried it quickly, so i can't relly give my opinion tough. It seams like they have come pretty far tough, there are some nice desktops out there and some are even easy to install these days.
Everything i use is made for windows tough, the only use i guess would be for a server or something.
One thing i don't like about linux tough is how it handles and shows the harddrives, it makes me crazy. Maby there is one that shows them like windows does?