I love how easy and convenient these are! I used to get so frustrated with the erasers for my dry erase boards because while they did in fact erase, they smeared and made things nasty and so I ended up having to either use a baby wipe, or wet paper towel or the expo spray and cleaning it anyways. These save me so much time! No sticky or weird feeling residue like some wipes and are quick, easy, and convenient! I will not buy another dry eraser ever again! These will be all I use from here on out!