"I have rated, as an estimate, 'performance', and 'reliability' as 3s because it is impossible to test this item without there being a fire. Otherwise, this item was relatively cheap, representing excellent value - the equivalent local D.I.Y. store price was double, and this includes Screwfix's p&p. D.I.Y. fitting was easy, as long as you are competent with a router - I borrowed one."