I have a PS-REV, the earlier model. It's been working perfectly for years. There is no noticeable switching delay, because of the all-electronic circuitry. Less expensive reversers sometimes use relays, which are much slower and more prone to eventual failure.
It takes an iron man to play with a toy iron horse.
I use two of the PSX AR's and like them very much. They seem to be bullet proff, are adjustable and so fast there is no perceptible power interruption.
I am a satisfied PSX-AR user, now just over three years.
-Crandell