happy with it. However, judging from the RME mailing list the new Fireface seems to be at least as good.
but only if you don't mind latency.
the fireface is a cool thing if you need microphone-in (it has built int mic-preamps and is powered via firewire - so you only need yor laptop, the fireface and some decent microphones to make high-quality recordings) ieee1394 transmits data in bursts (at least, that it is how i understand it) which makes it unusable for really low latency applications (a problem which is not present with the digiface or MADI-cards)
mfg.asd.r IOhannes