The ART arrived last night and I set it up in my living room. I don't have much experience with it yet, but a few things jump out immediately:
It has an incredible amount of gain. 80dB worth. I used to set my power amp gain at 12:00 or higher. Now I can just set it to "one". As a result, there is less hiss.
The preamp is very tubey-sounding. You can dial in a clean tone, slight fuzz, or overdriven buzz.
The compressor sounds great, though I'm not really a compressor kind of guy. Didn't hear any pumping, breathing, etc.
The EQ section is very flexible - two separate sweepable mid controls, and a shelving low and high control. The "Q" is selectable. The bands overlap for even more control.
Lastly, it's very, very quiet. Totally suitable for studio use. Not _dead_ quiet, but even with treble EQ maxed out, it's very, very quiet.
I'll report more after some gigs.