"I used these trimmers several times, and the result was crushed, split, painful nails. I couldn't figure out why it was doing this to their nails at first, but I think it's because they aren't sharp enough. Unfortunately, these were the first I bought, so I didn't know what to expect. I have since bought sharp, scissor-style clippers and am amazed at the difference. I've found Bamboo to be a sub-standard brand in most of their merchandise and would not purchase anything with the Bamboo name in the future."