so so [SEP] the power is a weaker than i expected it does do the job but i have to run the tool over a particular area a lot longer than i would have hoped before the dead skin is removed my feet are not what i consider very dry thus i do not have much to be removed however it works and this product is not expensive the replacement cartridges could become expensive if i have to replace them often i do not know yet i have only had the product a few weeks purchased feb i will try to remember to update with that information when i have had the tool longer