Our inlaws gave us the Eden Pure last fall swearing it was going to save us all $$$$$. (For the record we live in MI, in a 1800sq foot open concept home.) Our normal electric bill is 55-65 a month. In November it was $98, I wasnt pleased but anyway... December was $125 and our house was still cold, January Dh was home alot and we hit $225. I blew when I opened the bill. We pay $60 a month in propane for our budget plan so the heater had added $160 to my monthly bills when Dh was laid off.
My mother in law kept swearing her bill didnt change, wasnt going up. I kept telling Dh there is NO way that is possible, they kept it on higher than us all the time. We turned ours off at night and down during the day. They were estimating her bill for 3 months, it caught up to her in Feb to over $600 for her little place.
YRMV but ours is sitting in the closet, I wont use it. Plus they paid almost $500 for them each, if your electric rates are really low maybe it would work but not for us in MI.