cr500_af;734594 wrote: Without making it a popularity contest...
I've owned both. Reefkeepers are much easier and simpler to use/program, but the trade off is that they have less flexibility in what they can be configured to do. If you are going to end up with a complex system, go Apex. If you are going to be using it to simply control lights, fans, heaters etc (like most do), then the RK will be much easier to program.