Instruct: Classify Amazon reviews into positive or negative sentiment
Query: save your money

The cheapo 3M sponge style erasers (3M Whiteboard Eraser for Permanent Markers and Whiteboards, 5 Inches x 3 Inches x 1.2 Inches, 2 Pads/Pack (581-WBE)) work way better. Even though this is bigger, you end up having to go over the same areas multiple times. And the edge catches and the thing keeps wanting to topple over itself. The product seems good in concept but it is poorly executed.