I just returned the unopened RKL to Marine Depot and I'm waiting for the Apex Jr to come in. The built in web server made the difference for me. The set up is extremely easy (like the RK units you plug it into your computer). Controlling it from the iPhone or any web browser, and getting alerts via text and email should anything go out of bounds were the final points for me.
I don't need light control as that is built in to my LEDs. I already have the JBJ ATO and a heater controller, though I may put one heater on the Apex.
pH monitoring? Who cares? It varies by the time of day and as long as Alk
are in balance my pH will be in balance. OK, I actually do own a Pinpoint pH monitor too
For me it's the pump control, wave action and reporting/alerting at work that I want the unit for. I may add a flood detector and some other items later. If only there was a good, inexpensive Alk