Not like they used to make them!
I had bought these long ago, however, it seems the formula has changed?  The first time with the new version I left them on the recommended time and my heels barely peeled at all, it was mostly the arch and top of my foot that peeled.  The second time I thought I'd leave it an extra 20 mins or so, but that was a mistake as it burned my skin on the top of my foot, which stayed rough for about a month after that.
Rating: 3 stars