I've been on it about two months and it's been good. Overall the stubborn plaques on my feet have thinned and softened nicely. I think what helps is for you to first moisten (slightly) your skin prior to applying glycerin, then wait a few minutes, blot off the excess, then rub in petroleum jelly (Vaseline). The petroleum jello acts as a sealant. I do this when I apply glycerin before bed, not when I apply glycerin during the day (..because petroleum jelly is a bit messy).
And so I give a thumbs up to glycerin. It is helpful, but in my opinion it should be viewed only as complementary to some other treatment (conventional meds, diet/supplements).
_Lazza