Both. I just setup my intelink with my transmitter and tried to program my own heli and it stunk just like my real one. I tried to fix it and it seems that it is doing better with elevator to throttle mixing. This makes it keep a constant head speed on the turns. I also took out some of the top end pitch and throttle.

My real one looks like it climbs faster and it is a 30 while I have the foiler 60 in the sim.

I was wondering if you need this in real life as well or do you just get the GV-1.