very strong but works fast with short gentle touch [SEP] tried it last night after shower and it worked wonderfully it is true that this spinner is really strong i was trying with the black sanding pad the rougher one even at the lowest power i can feel my skin is burning if i left it longer than seconds so i just used the white pad less rough with the lowest setting making sure each contact is gentle or short my dry feet were cleaned within minutes put on some coconut oil and i am ready to wear sandals will give it a few more tries in coming months to see if the machinery is in good shape but the box says it comes with years of warrantee so i am not too worried about it