I bought these pans because I have had a small Circulon frying pan for over 2 years now, and I'm constantly delighted by its non-sticking power - even with regular use.  I've bought cheaper pans in the past and have been disappointed with their longevity - apart from my ScanPan, which is my No 1 - sorry Circulon...  But currently very happy with the performance of these pans for regular, every day use, though I have only had them for a month.