I have the Burst also. In the second month of operation and on my third program I had the absolute worst right leg pain in my life. So tech reprogrammed the unit. I have have nine, I think, programs and various power levels and the only thing that happened was the stimulator made my legs weak and they kept getting weaker to the point where I could not walk up any stairs. Tech installed more new programs. Nothing. I turned the unit off. And it has been off for months. I have regained leg strength and can go up stairs fairly easy now. Last week at my dermatologist he noticed the lump in my back and asked how well it is working. I said not at all. He said about 80% of his patients say the same thing. For a device that cost my insurance $250K, It sure hasn’t helped me one bit. I am living with tramadol, which my pain management provider would not give me, and Aleve. I also helped myself by losing 55 pounds.