Total
Handling
Features
Sound
Quality

What's to complain about?

I upgraded to the ADA8200 from it's predecessor the ADA8000 and I use it to expand my RME multiface and never once have I had cause to doubt it. I use it to connect my DAW to my outboard gear and synths, including send return loops. I clock the device from the RME, and they cooperate flawlessly. (Although I do need to replace one ADAT lead which has a habit of popping out whenever I go at the back of my rack).

Perhaps if was recording acoustic instruments I might notice issues with the preamps but if thats was the case I wanted to step up to the next level of improvement I'd need to spend five times and more the cost of the ADA8200.

I've never been able to identify the devices 'sound' so I take that to mean transparency which is exactly what I want.