This is our second Swiss Diamond fry pan. We have an electric range and were getting tired of warped pot and pan bottoms. Supermarket no-stick pans seemed to warp within a month or two. Calphalon and similar grade pans lasted longer, but eventually gave in to the warp. None of our pans really got hot enough to sear things on an electric range, warped or unwarped.These pots have a thick metal disk as a base. This means they take a while to heat up, but once the pan is hot, we can sear and cook quite nicely for the first time on our cooktop. We've never had a problem with sticking or warping. If you are a serious cook and gas is not an option, these pans really make a difference.NOTE: These pans can be warped if you plunge them into cold water while they are still hot. We don't do that, but you should know this. Our supermarket and other low end pans warped just fine from the stove heat, so these are much more durable.