I picked up a RKII about a year ago used and am really happy with it. My setup is pretty simple (return pump, 4 Koralias, heater, 2x250w halides, 1 T5, skimmer, fan) and it does everything I want it to do. I haven't had a single problem with it since I got it. I don't data log or anthing, I just wanted a controller to turn everything off and on when needed.