Product review (5 stars): the fan and current sensor switch arrived in good working order and were exactly as described
First, the fan and current sensor switch arrived in good working order and were exactly as described.

Second, despite what some reviews say, the included wiring instructions were adequate for an average DIYer to use.  They cover the wiring of the included current sensor switch.  If you are not completely familiar with the wiring of 220 and 120 outlets, a couple of web searches will provide the additional information necessary to complete this installation.  It's not a no brainer, but certainly not complicated either.