Well, it's much, much better than a AC97 codec. Sound quality is pretty good - and it supports A3D, EAX 1 & 2 and Sensaura Mulit-drive, MacroFX, ZoomFX. The Sensaura 3D engine is really good, and the drivers are good too. It may have slightly higher CPU utilisation, but it is still much better than AC97.
Cheers