Killer product Brian! My head unit has built in dual zone control which I thought was great, until I realized you had to navigate through a bunch of sub-menus to access it, combining that with a display being damn near impossible to see in the sun was not the simplicity I was looking for. I have an audiocontrol 6XS that I used primarily for sub-control. The 6XS didn't do much more than make my setup more complicated with a 3rd crossover, and occasionally would shut off for some reason.
I love the fact this unit has sub-control. When you have a solid 2000+ wrms going to a sub, you're going to want the ability to control output quickly and easily. I'm ditching my 6XS for this.
It's nice having the pioneers from Phoenix Gold in the boat audio industry. I've seen the amps you guys designed in the late 80's and early 90's selling for $1000+. The old school Phoenix Gold gear is highly sought after.