This was actually recommended to me by my daughters pediatrician. My daughter has a Biotinidase deficiency where she is unable to reuse or recycle the Biotin. This Superior Source is great for us for one, because it is dissolvable, and two, it is a more pure biotin with no unnecessary additives (says the pediatrician), and it is PPA approved.
I will only buy it from eVitamins now, since they give the best price and a fair delivery. If you try buying it in a vitamin shop, this will cost you $31.99 and that is only for 60 tablets.