Product review (5 stars): How did I not have these sooner?
These are wonderful!  They are able to be trimmed (we did not need to) and are put on in seconds!! They stick in place firmly, at least ours haven't moved yet, but remove for cleaning effortlessly! They are so easy to wipe clean in place as well.  I have a messy-man-cook and 2 teens, to me they are worth every penny!