I have been using Futaba radios for about 20 years starting with their Gold series AM radios. I have never had a days trouble with any of them. However, I now have my first PCM radio and it has gone into fail safe a couple of times including once when I was hovering my Raptor. It turned around 180 degrees and started coming straight at me. Took it nearly 30 seconds to return control to me.

I doubt I'll ever use PCM again. I just didn't like that one bit. When using FM I've never even noticed a glitch. If I have gotten any, they were so short that they were imperceptible.