Product review (3 stars): It works but, not a perfect solution. There is no perfect solution (yet).
UPDATE: I put them on the top rack of the dishwasher to wash them. A brand new dishwasher (not that that matters).
Sadly, they came out pretty water spotted. I think it is better to wash them in the sink by hand.
The spots will probably come out, eventually.
Yes, I had rinse aid and used a top rated dish washing detergent.
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I have a pretty typical slide in range and a pretty typical formica counter. These work OK. This is a problem that is kind of hard to fix. Stuff falls between the range. Do these fix that? Yes. Do they make life easier? Not really. You still have to clean these once a week or so, depending on how much you cook and how sloppy you are.
IMO they are unattractive. When you have guests, I would probably roll them up and put them under the sink (or in the dishwasher for a wash).