Posted by anon November 14th, 2021 Purchased July 2020 — products protect burner coils and create even heat, which is great for larger pans. However, three warped (one with edges that fold up, and two with raised centers) within six months. Still using them because they protect the rest of the stove, but they aren’t flat and no longer distribute heat evenly. Paint flaked off as soon as they started to warp. Posted by Nordic Ware April 14th, 2022 We’re so sorry for any difficulties. Please contact our Customer Experience Team at email@example.com for warranty.