I'd want to know what would make it worth spending the difference in cost between it and the CMC unit. It looks to be more expensive then even the CMC unit which includes a trim gauge and I'm not seeing that the Pow'r unit has one. I've heard nothing but good about the CMCs.
I have a chance to buy one for $200. I'm told it is missing the selonoids, but it works. I already have a gauge and switch on the boat and I'm hoping all I have to do is wire it in.