I would say that most, if not all practitioners who are trained by Dr. Wilson, http://www.drlwilson.com, have good results. The nature of NB, though, is to deal with root problems, and you should expect to feel worse in some ways. However, it's worth it...at least in my estimation! A good first step would be for you to read through Dr. Wilson's site, and get a better understanding of what NB does. The testimonials page is also very helpful.
I really like my practitioner, Dr. Larry McHaney and can recommend him.
On a personal note, if I were in my 2o's, it would be a great time to deal with the root causes of poor health. Given the choice, I would have done that.