I assume that Dr.S approves of it's use since she sells it on her web site at: http://www.schwarzbeinprinciple.com/
also can arrive there at :
http://www.Drhormone.com

I have used it for quite awhile and am quite satisfied with it.

I have been thinking of trying the kind with FOS (a natural fiber I think made from chicory)in it and wondered if anyone else has any experience with it?