Yeah. We've tried them. At first we thought "Wow! What a bargain!" But they haven't been entirely trouble-free by any means. We bought 5, sold all or most of them, bought another five the other day. Tannin likes them because they are cheap, have an AGP slot, are a decent brand, and have (so he's told) good sound and video.
Kristi doesn't like them. She says the drivers don't work: you have to install every damn thing one bit at a time, and there are a million different drivers to load. Takes forever. And they don't always work. One day last week he had to do a motherboard change because whenever she loaded the drivers the thing would start playing up. Tried clean installs, swapped the RAM, everything. Gave up and put a VIA board in in the end - the customer was picking up any minute now - and scrounged around for a crappy ATI 8MB video card to put in the substitute board.
Only time I've done one it just worked first time: integrated install routine and everything. But maybe I just got lucky. We will have to wait and see how this second batch of five go. If Kristi's still complaining, we will switch back to VIA-based boards. Have to keep Kristi happy.
On the whole, I'm torn: I like the no-fuss, plug in and work first time, every time that VIA boards give you, but I don't like their under-spec graphics chips. And the first time, every time rule really only applies to the ones that don't have crappy integrated video. If I just want it to work, I use a KT-266A (or an AMD 760) and a Nvidia video card.
VIA chipset, Nvidia video board. Best combination around.