It is wonderful stuff!
You put some on a big lump of cotton wool and then put the wad of wet cotton wool on your hard skin bits. I usually put a pair of socks on over the top to keep it in good contact with my feet.
Leave for 30 mins and then start scraping.
You get a shaped scraper with different edges which are suitable for different bits of your feet.
You need to keep workign away at it though - as when you first start scraping it doesn;t seem that much will come off. Keep scraping though and it gradually starts to come off faster and then you get your big wadges of luverly skin deposits
It is enormously satisfying and you get almost an immediate effect. I used it twice weekly until my feet were in a good state then resorted to once weekly or less to keep them neat looking