Product review (3 stars): Attractive, but flimsy
I had a set of porcelain enamel on steel burner covers that I loved, but they got old and had been accidentally burned a couple of times.  When the Corelle covers came, I was not happy with the flimsy quality.  They will easily dent and warp if not treated gently.  Also, they did not fit over my GE electric burners without wobbling.  The solution to my problem was to use them over the old porcelain/steel covers.  That worked like a charm.  The old covers give them the support and strength to keep them from warping or denting....... and the new white color is very attractive in my kitchen.