I use the Ped Egg, and it's awesome. use it for a few days in a row & all the nasty crasked rough bits are gone, and replaced with smooth skin! I'm far too lazy to use moisturisers, but I have them. But the ped egg really is brilliant.

It looks like a cheese grater... but unless you actually had wounds where your feet crack, it doesn't hurt. If you do - you might try a pumice block in the shower for a week first to get the worse of it down gently.