I've been using this beautiful saute pan for about a month now and i'm completely in love with it.  With all prior saute pans I've used, I've seen signs of warping and discoloration, even this soon after starting to use, and even with my being so careful about handling.  I use that same care with this one and so far I see no sign of warping or discoloration or strange metallic smells or changes in the non-stick finish.  The proof will be in the condition of the pan a year from now.   So far, I love it and plan to replace the rest of my cookware, as I need it, with these pans.