Bests & Worsts Reviews from Amazon

I am constantly searching for high quality and innovative office supplies. As a graduate student, I am constantly using pencils, erasers, etc. During the past year, I have compared the performance of different erasers: 1. the Pentel Hi-Polymer (this one) 2. Faber-Castell Dust-Free Eraser 3. General's Tri-Tip Eraser 4. Staedtler Mars Latex-Free Eraser, White 5. Tombow Mono Plastic Eraser . Results: first place: the japanese erasers Pentel and Tombow performed the best: they erase very very well. They don't smudge and there is no trace of what was written in the paper. second place: Faber-Castell eraser and Staedler performs well but not as well as the Pentel and Tombow. third place: General's Tri-Tip does not erase completely and tends to break when you are erasing. Because of this, they sometimes damage the paper. Note: I've used HB pencils for my tests.