I am also a beta tester for the Archon. I used the RKE until getting the Archon. Like Lindsey I do not want to go back to the RKE. I have things at the tank and also in my garage. With an iPad I have the same access to the controller in either location. As far as that goes I could be in a different state and still have the same access. There are some things I would not be able to do without being there such as port calibration. I guess that is even possible if you have someone to place the probe in the different calibration fluids for you while you do the calibration. The memory and a lot of the programming is on a USB memory stick. It comes with a 4gb memory stick but I am currently using a 16gb stick so it is very expandable. As a beta tester it makes it easier to have 2 memory sticks. That way I can update the files on the stick and just have the system powered down omly for the amount of time it takes to change out the stick. Although as of late that has not been necessary since thay are now updating the files on the stick via the Archon. I use the 2 PWM channels with my LED lighting. I use the Meanwell LDD type drivers and drive them directly with the Archon. Two of the 0-10v channels have the same connectors as the APC module. If you get the Archon make sure and get the IOE module. This is the breakout box for the 4 switch ports, 2 of the 0-10v outputs and the 2 PWM outputs. It makes it lot easier to connect to these ports. I am very happy with the Archon. I have never used the Apex so I cannot comment on it.