I have three Microfiber Dish Drying Mats on the boat.
I keep one on each side of my sink and another on the opposite counter. The one's next to my sink are used for drying dishes obviously but, one of them is also next to my stove and acts as a supper large hot pad. It's much better than putting down potholders or trivets because it covers the entire area, is always out and available, and stuff that is placed on it doesn't slide around or off underway. Pans out of the oven go straight onto the counter without a problem.
I also have one that is under my cutting board on the opposite counter. I like to keep my cutting board out on the counter because it's large to store and I use it all the time (no real point in stashing it if I'm just going to get it out again). Having the pad under my cutting board allows me to wash the board and then just put it back where it belongs. Underway the pad keeps the board from sliding around. It also catches and absorbes any liquids that may spill which is much better than it getting into the crevices on the counter. Since they are washable when it happens I just throw it in the laundry.
In short they are great for a number of reason... stuff can dry on them, they stop stuff from sliding around, and they work great as a large heat pad.