I was just shocked by the sound quality of the output, as well as the sound of the preamp! I've tried the Universal Audio Volt 1, the Steinberg UR12 in this price range, and the SSL2, which is slightly more expensive (Of course, I've heard of more expensive interfaces, but that's not what I'm talking about). Steinberg and UA are just children's toys compared to this interface! SSL2 is a little better, but it's not as impressive either. In ESI Amber, you get a real "adult" sound for very little money!