we have it in our bathroom cost about 600 bucks hubby installed it himself very simple.
and we havent noticed a huge rise in our electricity bill.

we keep our floor at about 21 degrees and its on all day every day it keeps the chill off the bathroom aswell and is lovely to get out of a nice warm shower onto warm floor and your feet dont get cold at 2 in teh morning when you have to wee lol