Over the years, I've tried a lot of erasers, but these two have got to be the best! They both erase well, and don't leave streaks or marks on the page (if you pressed really hard or used a dark pencil, you might be left with some marks, but it still erases that well.) Both erasers feel so smooth, and both pick up the dust so that you really don't have to sweep the page too much. Overall, very pleased. I also got a little eraser stencil. Haven't used it yet, but it looks handy.