Bought this a year ago, and have nothing but good to say about it. I recently upgraded to an RME Raydat, and no longer have use for the Echo.
Has 12 ins / 12 outs, and works like a charm. I was using it at 96KHZ with 10ms latency on my Linux box.
Works flawlessly in Linux, Mac, and Windows.
Selling it for half of what I bought it for - any takers for $300.00?
Unit is in perfect working condition, and only has normal rack-mount usage in my smoke-free studio.