In 2009, a number of hair restoration and cosmetic surgery clinics from the Netherlands and Belgium sued Dr. Gho and his Hair Science Institute clinic for false advertising based on the claims he was making about his HST procedure.
On both occasions this was done, the courts ruled in Dr. Gho's favour.
Here's a retraction from Dr. Feriduni, who's a well respected hair transplant surgeon specializing in FUE:
More information can be found on HASCI's website under the "News" and then the "File: Hair Stem Cell transplantation" sections.
Certainly, gives credit that Dr. Gho is doing things that other hair transplant surgeons cannot. Once again, I think we should all get behind this initiative so that we can develop a full understanding of HST and its limitations.