It's hard to describe in words how much better the sound is than the UCX II, and that was nothing. RME Audio has gone all out this time, I've had it for almost 3 months as I write this, I sold a UFX II because of it. For me it is mainly Intstrument channels 9/10 & 10/11 that are in heavy use and used for synth input. They never sounded so good, the DURec is in constant use standalone alongside an ARC USB...I don't know when I last turned on the computer because of it, maybe when I saved the settings...