These are by far the best pans I've EVER found or used!  All of the other so called non-stick pans work good for awhile, but never stay that way.  They warp, start peeling and sticking...all this and that's if you are very, very careful and follow all their instructions.  With "The Rock" Frying Pans I've never had any of these problems.  I cook a lot and I like to cook on higher heats too.  It doesn't seem to effect them.  They still stay true, do not warp, do not stick and do not peel.  I've been using my first pans for almost a year now.  I LOVE MY ROCK FRYING PANS!