North American spine institute

I need info from patients that got surgery from this place for herniated discs,I already had two previous surgeries ,both done at microspine with an endoscope.The website for this clinic in Dallas claims that they have a better technique as they can also look at other levels and diagnose and inspect. One of my concerns is that when you do the endoscope thing,is that you may or may not treat the right area,because you dont know if your pain is going to be reduced until later,and then sometimes due to all the meds.pre and postop.