I used an XGI V3 for a while as an experiment. It had early drivers back when I had it, so I had some rendering problems with a couple games (Doom 3). Not that it mattered, the card didn't have enough 3D power to run that game satisfactorily anyway.
I did have it running HL2, which was neat
2D quality was actually quite good, on par with ATI cards and good Nvidia cards I've used. Output a video to my TV with Svideo, and that worked fine as well.
It was a nice card for $40, but you can get other cards for that price that can do the same thing, and will have better support since XGI sold off its desktop graphics division a while ago, so I don't know how much longer support will last.