Product review (5 stars): No More Crumbs!
These are great!  So much easier than pulling the oven out every month to sweep what might have slipped through the cracks.  I thought I would have to cut mine to fit but they were perfect already.  My counter top is a tad higher than my stove top so the gap cover sits tilted, but amazingly it doesn't slip out (or move around at all).  It provides 100% coverage as if the counter and stove were flush.  They are nice and wide, but I can safely use the electric burner right next to it without having to worry about the risk of fire.  I also keep burner covers on my stove top when not in use and the gap cover does not interfere - still plenty of room in between!  Very easy to clean but not really necessary because nothing seems to stick to the silicone top (even bacon grease wipes right off after hours of sitting).  I love the extended slip underneath that sits in the gap between the counter & oven.  There were two gap covers in my package but I only needed one - my curious boyfriend swiped the second one for his home as soon as it came available!