I don't know, maybe I'm just fortunate that I never had a non-user issue with any of the Spektrum radios I've owned. Let me say that I have four Futabas, three Airtronics and three Spektrums. Only one of the Airtronics and one Futaba ever broke while in use.

Spektrum range has never been an issue as I only race and never bash so the track coverage is more than ample. Glitches are none existant except when I forget to charge/replace the batteries in the radio or car. My DX3R and DX3R Pro have never been a problem and work great with the sub$10 receivers. Come to think of it, I don't remember any glitching with any radio I had except for one of the RTR radios.

I see a lot of Spektrum Air radios out there and I have a DX6i too. If they're so bad then why would anyone fly a plane using one?

Just my opinion.