Expensive but worth it. I still use paper-based abrasives for rough jobs (especially removing tool marks on bowls) that tend to ruin a piece of sandpaper. But other than that, I may never go back to regular sandpaper. I use this (obviously) for flipping and cutting strips into quarters. I tend to use them for a few projects before the abrasive can finally use its cutting ability effectively. It definitely lasts longer than other sandpaper and produces a finer finish than the equivalent grit (ie if you really need 80 grit you can start with 80 grit paper and then move on to 80 grit sandpaper).