Wow I am astonsihed to see that you priced Woodies for 3 rolls @ 90 Euro, and he charged you 450 Euro for doing 21 rads in 2 1/2 hours (thats 7 min per rad)..I would love to work for you. He basically made (Im sure he buys materials in bulk) 300 % profit. Lets be real here, this is basic heat loss material being stuck to wall behind Rad, its not rocket Science, no wires, no controllers, just glue. I am sure it works though and will certainly try it myself, just my 2 pence worth. (how much would you pay to have some one place tin foil under the grill tray , it throws heat back up to the delicious harty morning fry and also acts as a deterant to corrosion of grill tray!)