Great Product / Great Support
I purchased this interface to support a live multitrack recording setup, using a MacBookPro as the keyboard rig and wanting to route different VI channels in Live to separate analog and digital audio outputs on the MOTU. I encountered two issues, one was clearly an older MBP that couldn't keep up with higher sample rates, the other was a legacy MIDI driver that caused a conflict with the MOTU MIDI driver.
In both cases, MOTU support was right there with me making sure I had the info I needed. The MIDI issue was the most difficult, but was resolved in 1-2 days.
This is a very solid product, both mechanically and architecturally. On an previous smaller audio interface, I used a pair of analog outputs/inputs and short TRS cables to provide a loopback requirement Now, the MOTU interface permits me to create virtual outputs and inputs and even patch them virtually. As I move the interface from Mac to Mac, those settings are remembered by the hardware - superb.
Highly recommended and well though out product.