I have the APEX. It took a while to get it all working right and can be a little frustrating but I can now control it from my phone and IPAD. It send me (1) Email update daily and emails me if anything goes wrong. I am not sure you can do that with RKE and others? I control:

(2) Heaters
Hydor Smart Wave just for Feeding
BRS Dosers Alk - Cal
Main Return
Skimmer
Refugium Lighting
PH
TEMP

I also have AI Vega Lighting not plugged into APEX!