I‘ve been flying an X20 for over a year now. It was a big change from my Hitec A9 but has been worth the effort. Ethos is their new operating system and from what I understand is similar to Open Tx. I’ve grown to be a competent but casual user. The radio is mind boggling in what it is capable of, 99% of which I will never use. Updates have gotten much easier since the release of Ethos Suite which pretty much will do it for you automatically. Given time and patience they’re great radios although the learning curve can be steep.