I'm a long time fixed wing pilot and had been using Spektrum since 2.4ghz radios were first available. I stuck with Spektrum when I got into FPV quads because I wanted to use the same transmitter for all my aircraft. The RadioMaster allows me to do that, but it also allows me to use FrSky and Crossfire receivers. I was nervous about the OpenTX learning curve, but I had no trouble at all. It's a fantastic radio.