I'm amazed at how much All-Clad goes for nowadays, and that people are willing to pay for it. I owned A-C back in the day before it became popular - it wasn't available in consumer stores then, and I got mine at a restaurant supply house. There were a few things that irritated me - I don't like rivets inside, and the rims were not made for pouring. I gave them away and replaced them with Sitram's Catering Line, most of which I also got at a restaurant supply house when it went out of business. I've never had a problem with warping, but then I never use high heat with AC or Sitram. High heat is reserved for the wok, Bourgeat black steel, and cast iron. I do have a few non-stick pans, but avoid them when possible. (I now use the a Bourgeat black steel pan for omelettes.) So, for me All-Clad is waste of money - not because it's not good, but because it's now way overpriced. For less money, I'll take Sitram's Catering line, or Bourgeat's Excellence line anytime.