Ive just laid this in our house. Works a treat! Dogs love it, keeps their little paws warm lol

Got a sparky round to wire it up as had the house rewired as well. Didnt look to difficult though. couple of wires coming off the floor mat going into back of thermostat, then wired to live.

Cant comment on costs as only had it about 6 weeks - not had a bill yet... i'll let you know though

well pleased with it though