I've also found that they seem unnecessary, a damp paper towel work just about as well.

These erasers work unbelievable well

It works as well as the spray and wipe stuff, if not better

I did not have the courage to try permanent markers on my whiteboard, but if it works as well as everyone says it does on permanent markers, I am even more impressed!

They clean up well also

And they work as good as they claim in their add

Meh, they don't really work as well as I thought they would.

These erasers work unbelievable well

I love products that clean well and don't require chemicals to do a job well done

I've been impressed by magic erasers for use in the home for years, and it occurred to me that these 3M whiteboard erasers might work just as well on vinyl mats