The US800 had actually really clean pre-amps, when it worked. There was a process you could go through to record/mix for about 1/2 hour, then shut your entire system, start back up the whole thing (turning on the US800 after fully loading windows), firing back up the DAW and getting back into it, which would avoid it just locking up your system, but it was a huge pain in the rear that was not worth it. The other thing that did work is that it truly worked as a very simple mixer without the PC connection.

-Scott