The negative reviews on this product must have caused panic among 3M executives who realize that people don't want to pay that much for their overpriced sandpaper. I had low expectations for this material but was pleasantly surprised by its durability. I sanded down quite a bit of wood, some hardwoods, with some sand. Each was very long. I even put the sheet on the hand sander, although it's not wide enough to completely cover the pad. Good condition for that. I just wish they would sell it in large blades or at least half or quarter blades for use on a quarter blade sander.