Product review (5 stars): Waited awhile before posting review.
With three teens in the house, we're always cooking in overhead microwave and stovetop (read: messy!)  These covers wash up well and have no signs of wear!  I only wipe them with kitchen cleaner, never submerse in sink.  After reading other reviews, I announced from day-one that NOTHING is to be set on these covers --lest they scratch or dent.  I do not know how they would hold up otherwise.  Contemplated 4 round burner option or these 2 rectangle.  Pleased with these because they serve my purpose: a clean, solid white appearance.  Update: four months later, still very little signs of wear!  I wipe them down with Fantastic and paper towels. The edges are showing no signs of corrosion, they've not bent (despite being manhandled), and the finish is shiny as the day I bought them.