lack of power needs more aggressive pads [SEP] i originally got this to prevent ingrown toenails and to use on my fingernails after cutting but was disappointed on both counts the roughest pad took forever to file down my nails and the device had very little power bogging down with any more than the slightest pressure meanwhile my manual crystal file took a few swipes and was done i do not have heavy or thick nails but this still was not up to the job maybe if you have lots of time or you just want to gently polish out slight imperfections then this is for you