I have an AC Jr. I bought it because it was 1) cheaper than the Profilux and 2) it had an external switch port which I wanted to use for my ATO.
The unit is pretty nice. It doesn't have some of the fancy features of the Profilux (wireless LAN or Ethernet Connection). Also, I used the onboard serial port to control my AutoTopoff, so if I ever wanted to connect it to my computer, I'd have to unplug my ATO.
The unit itself is pretty easy to use. The display is fairly easy to read, though the icons they use for Lights, Pumps, etc can be a bit confusing. Programming is easy and if you've ever written computer scripts, it should be a snap.
The AC Jr. can only control up to 12 outlets via 1 DC8 and 1 DC4 (or 3 DC4), so if you need more than that, this won't be the unit for you.
__________________
32"x32"x20" Cube-ish tank
|