[Closed] wood/laminate elec underfloor heat experiences?

Anyone have any experience of those electric underfloor mats for underneath wood floors?
either the cables encapsulated in foil or even those startrek looking carbon film kits?

Strongly considering buying out of the uk as they are half the price of the 'same' product here (warmup products).. I'm ready to run off 240v too, so presumably no power (I x V) compatibility issues between the products.

As with anything there's cheap and there's reputable.
Who's the go to name brand as far as these kits though?
Ta