I actually have one. Works great, never pay for itself:) but it does dehumidify my walk out basement and I'm ducting it into my living room for the AC. I can't run it all year as I'm in Maine and it would freeze my basement solid in the winter:) Why folks down south aren't using them is baffling. less baffling than folks down south not using solar though, that drives me crazy
BTW it has a COP of 2.5 and cost me 800 bucks