Actually it was Bill R who commented on the reverse cycle.
Fortunately I mostly agree. I wouldn’t pay extra for reverse cycle, and we have never used it on our units. Of course we tend to stay where it is warm!
I don’t think having the reverse cycle adds a significant failure point however. So I don’t see having it installed is a downside. The biggest risk is that the reverse valve sticks and you are stuck forever cooling.
Annapolis, MD, USA