I just want to say Big Thank You to @geoffrey for all the work he is putting on this driver and GUI app. This thread (plus the specs, of course) was the reason for me to try one of these new interfaces. The previous one was also good, but from time to time I had to switch to my emergency-Windows partition, and that bothered me immensely. I mean,. not just that, but the fact of having to find workarounds because the manufacturer didn't care about Linux.
And it's not that Focusrite cares immensely or officially, but they care unofficially, and then Geoffrey clearly cares a lot. This has made all the difference. He has helped me figure out the installation process (not the easiest right now, but worth the effort) and, more than that, he has patiently answered all my questions, half of them having nothing specific about his software but being generic questions about routing, PCMs, standalone mode, and stuff.