I have two HDR Fox T2s, one using AR the other using padding. Between the two different scheduling methods one of them usually gets the recording, it's a long time since they both missed something. Once every few months one of them locks up but I have two, that's only a problem when I'm on holiday with risk of both locking up.
Mine are on smart plugs, and registered with RS. When RS alerts me that a unit hasn't been seen in the last three hours, I can power-cycle it wherever I am.
If both of mine fail to record something I can watch it on catchup on my Apple TV 4K when I get home. It's a last resort as I lose 5.1 sound for things that had it and I have to watch adverts on commercial channels, but it's OK as a last resort. Both HDR Fox T2s are registered on RS but there are no smart plugs on them.