Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Blu Tack

I purchased Blu-Tack Re-Usable Adhesive because I had read that it worked really well as an eraser for artists (charcoal, graphite, etc.) I gave samples of it to 25 of my art students and none were impressed. It did not pick up nearly as well as the traditional putty (kneadable) erasers. Not one of my students said they would purchase it themselves.It probably works really well for its intended use as a nonabrasive adhesive, but not so much as an artist's eraser.