I've looked at it, but since we spend next to no time in cold weather it would be wasted money spent. We have the fireplace and heat pumps on both ACs, so we're fine for cool nights.
If you spend lots of time in the cold with temps below freezing might pay for it's self over time.
Michelle & Ann
2018 Chevy 3500HD Crew Cab High Country DRW, D/A, 2016 RW39MB, Dual ACs, Auto Level, Auto Sat Dish, Stack W/D, King Sleep #, 17.5" Sailuns w/Disc, MORryde IS & Pin, Comfort Ride Hitch, 5.5 Onan, Res Fridge & Induction Cook Top