LOVE, LOVE THIS PRODUCT! [SEP] I purchased this product after severely cutting my heel with one of those blades used to cut the calluses from your feet. My husband had warned me of the dangers of using blades, and I've cut my feet several times. I read many reviews on this product and others before purchasing. It came in 2 days and had a charge when it arrived.  I keep it plugged in so it's ready whenever my husband or I are needing to use it. I'm very pleased with this product, and very happy that I purchased this.  It works very well and does a great job, and I use it at least once a week to keep my feet really soft. My husband also uses it about once a week also, to keep his feet smooth.  He was shot in the foot and the bullet fragments are still in his foot, and he gets calluses where the fragments are in his foot. I also purchased the extra rollers, but haven't had to change the original one out yet.  Those who complained about this product must not have used it properly.  When using don't press down thinking that extra pressure will help, it's not designed to be used like that.  Just lightly touch the area you want to treat and the file will definitely work well. For those who have a lot of hard calluses, you might want to either soak your feet first to soften the skin,  or use it everyday for a couple of days until you get the best results.  You don't want to over do it because you may cause your feet to be sore. I'm very happy with my purchase and highly recommend this wonderful gadget to anyone.  It will definitely save you a lot of money on getting pedicures elsewhere!