I am on my feet all day at work and my heels get very dry and calloused so when I saw this on sale I was excited to try it. A few sprays on my heel, a minute of wait and then the filing. I gasped when I saw how, after a bit of filing, my callous heels exploded with little rolls of dead skin that looked like eraser shavings.
Besides that, I didn't have to spend a lot of time smoothing everything out after a rough file, iykyk, and my feet actually were smooth and shinny and hydrated looking even before I put on lotion.
Highly recommend if you are hard on your feet and they get dusty and crusty after a long work week.