Magic Non-Stick Oven Liner Standard 50 x 50cm 5 "Fantastic product" Mrs Megginson 31 July 2012 I have a fan oven and have had no problems whatsoever with this. I was going to buy a cheaper liner but was told by a relative not to bother as the cheaper ones were not as effective. I have bought 3 of these, 2 for each floor of my double oven, and one to put in the grill tray and on baking trays. I would warn, tho, that the surface you put these on must be completely clean as any grease trapped underneath will really stick to the sheet and be difficult to get off. Odd really when spilt grease will just slide off. Really is worth the money.