From what I gather, one of the beauties of this system is to do exactly what the OP is trying to do by flying different brand radios. I've seen people use this system at my club and it is quite neat. In fact, most of the people using it are intermediate flyers trying out stuff on each others planes with the "safety" of having the owner be a click away. However, you don't have to look like a newb with a buddy cord.

Is this system for everybody? Nope, it's not

But is it a cool gadget that is simple to use and can be fun for all ability levels, and cure some cross-brand interfacing issues? Most Definitely. And besides, who doesn't enjoy having the latest gadget?

Just keep an open mind. And to the OP, if you are interested, just try it, I'm sure you'll enjoy it.