Review (5/5): This is the best one for dealing with calluses that I've ever used.
This takes a little time to get used to operating it correctly. I think the key is not going after the calluses the way you would with some of the products out there but the results are better than anything I've tried before and I've tried them all. Take your time getting used to how it works because this is a serious callus remover. I use it very lightly on the calluses and I have a healthy fear of the injury it can cause if not used correctly but it's my opinion that this is the one that really works.