M-Audio Delta-66 PCI audio interface

I have had no problems at all with this interface. Sonar just profiles the device and away we go. I initially thought I would never use the SPDIF inputs but then I got the Roland Fantom, which has digital audio out. Apart from being lower in volume, I figure it has got to be better, right? So I feed the Fantom digital out into the SPDIF on the Delta-66 card.