I have been using this product for one month and am writing this review eleven months before I meant to, because I have noticed a huge difference in the appearance of my horrible toe nails. Summer is on it's way and I never wear anything but Fit Flops right through summer, and the way my nails were looking was making me feel a bit worried about them being on view. Well one month later I am not worrying anymore. The difference is amazing and I am not ashamed to put my Fit Flops on. Obviously they are not perfect yet but the discolouration has gone, and I can see the new nail growth is free of fungus. The product is very very easy to use with a nice neat built in brush. The only thing I don't like is having to file my toe nails once a week, but that is a small thing and is more than compensated by the speed of improvement. I used to use a different but just as effective product, but the applicator was fine for a few days and would then fray so badly it was nearly useless. No such problem with this one. I would recommend this product without exceptions.