I'm messy when I paint and have to have something under my canvas. I like these because I can blend paint, smoosh it around and play with it right on the mat.
Clean up is a breeze. Just wipe with a damp paper towl. Even if the acrylic is dried on you can still get it off with a little "hand sanitizer" (great for cleaning your acrylic filled brushes too) I finally gave in an threw out the mat I've been using for a couple of years, I swear. Paid $1.69 for a package of 2. I figure I shouldn't have to buy again for 4 or 5 years LOL