They are absolutely EXCELLENT. We have recommended them to others who have recovered their children from autism due to vaccine injury, we use them with our daughter, my grandmother with alzheimers has had good results with cognitive function restoration (although my mother was unable to keep up with it, she has not lost what she gained). We also used it after several failed attempts with Diflucan, Fluconazole, Nzymes, CandidaClear and many other products for systemic yeast for our dog.
As far as price, really, you do not take these forever. None of them are meant to be a daily supplement, and they work very well, very quickly. The quality of the products makes them less expensive in that you use less than you would in other products.