I would say it would be great as long as the posts were meaningful enough and showed that the user actually used it/read it and was giving the objective review. All too often you see the 'wonderful' participants who just blindly accept the product is good and working or ebook is up to par that they will post accordingly. I think anyone that posts a review within hours of getting the materials cannot possibly be giving a helpful review. Perhaps for the ebooks as far as concepts go....