Very disappointed with these pans. The 2 pans that we use all the time developed a warp in the bottom of them. They would rock on our flat top range. Had to put a cloth under the handle to keep them from spinning. Contacted Calphalon and they responded but it was a terribly long process. Only to find out that they didn’t have the smaller pan any more. So, the set was less then a year old and the 10” pan was no longer available. We bought the set to have a nice complete set. I suggested that they send a complete new set and I would return the old one. That didn’t work for them. I ended up getting cash back for the 10” pan. Now we have Heinkel pans. Also the pots are getting scratched up. Not worth it. The lifetime warranty is useless. They worked well for the first 6 months.