I've never used this thing, though M-Audio makes very good equipment. I wonder, though, why USB? I have a tough enough time managing 16 bit/48 kHz audio in and out of a USB device. I can't imagine how 24 bit/96 kHz is going to work reliably in USB's rather limited bandwidth.
I've really come to dislike USB, period. It's not adequate for audio; it seems flaky for printers, mice, keyboards and the like. All of the trouble-free connectivity and hype about USB never translated to reality, if you ask me. And I couldn't care less about USB 2.2, or whatever it's called. So what if it's faster? Still the same problems and still not as fast and reliable as Firewire. (Isn't USB an Intel invention?)
Other than MOTU, is ANYONE making Firewire audio devices? This one should be a no-brainer - reliablilty, plenty of available bandwidth, etc. I just don't understand why so many (M-Audio, Roland, etc.) are continuing to develop USB peripherals for this purpose. It is not as if Firewire is an esoteric standard. Try capturing video (Mac or PC) without it!
But it would be nice to see more affordable Firewire audio devices around. I wonder if it's all about licensing fees. Perhaps Roland saves 2 cents by choosing USB over Firewire. Who knows?!