I've had a chance to spend some more time with this remote today.
Generally, a nice remote. It feels good and I don't miss the accidental mishaps of the touch pad.
However, a couple of things to note...
In general, the Guide button doesn't do anything in any App. (ie; Channels, Disney+, HBOMax) but this is not too surprising since this button seems to be specific to the Spectrum App according to the docs.
Within Channels the Navigation ring Up/Down buttons to not mimic the Swipe Up/Down of the Apple remote. So, you can't bring up the timeline or bring down the Quick Guide with the ring. It does work properly in the other Apps I mentioned previously.
The Fastforward/Rewind buttons do not work in Channels either. In the other mentioned apps they toggle the appropriate function until pressed again. So, really nice for moving forward or reverse over a longer period of time than just the typical seek times.
All other buttons seems to work appropriately. Having the mute button is very nice.
On the whole, I can't recommend this remote for Channels unless the developers can address the issues with the navigation ring at a minimum. The fast forward / rewind would be super cool if that can be done as well. @Maddox - can these two issues be fixed?