Not perfect, but so much better than anything else it warrants 5 stars.
Update after 18 months of use:<br /><br />Still the best callus remover I have ever found. Absolutely 100% recommend. Before purchasing this I had nearly constant foot pain, and nothing I found could adequately deal with my calluses. Since I bought this, my problem has been solved.<br /><br />The few negative reviews all site the same basic complaint: It is not powerful enough. That is due to the power supply that they chose to include. It has ample power at full speed, but the power drops off as you slow it down, and even slightly below full speed it becomes unusable. To me that is not an issue. I prefer it at full speed anyway, but for others it might be an issue.<br /><br />They claim the new version addresses the problem. I don't know if that is true or not, but I would still not hesitate to recommend this.<br /><br />--- Original Review ---<br />By far the best callous remover I have found. Mechanically, it is very simple and should be reliable. The consumables are dirt cheap and easy to use. And it just works. My feet are in better shape than they have been in in years.<br /><br />The not quite perfect:<br /><br />* Having the power switch and speed control on the cord is annoying. It works, but it is a pain to use. Personally,.I only use it at full speed, so it is  not a huge deal. The bigger issue is that if the wall wart fails, you just replace it with a standard power supply. Integrating the speed controller into the device would make it far more reliable.<br />* For most parts of my foot, the design is great, but it would be nice if it had a sort of pistol grip handle to reach the callouses on the bottom of my foot.<br /><br />Neither of these issues are deal breakers. I've tried the Emjoi and similar callous removers and different manual tools, but this works far better.
Rating: 5 stars