I had a medtronics SCS implanted back in 2017. Along with meds, it provided decent relief for about 3 years. Then, for some inexplicable reason, it just stopped giving any relief, no matter how many adjustments were made. I will say that my local Medtronics rep was very attentive to my needs, usually meeting me at pain doc's office within a day or two. It was suggested that I have the Medtronics unit replaced with a NEVRO unit. I went through the trial, but they could not get the trial lead in a good spot for testing. The NEVRO rep swore that his unit would definitely provide significant relief. So, I had the NEVRO implanted. They had to use an adapter in order to attach it to the old paddle leads. Guess what? Not an iota of pain relief. No matter how many adjustments were made. I worked with two NEVRO reps who were much more helpful than the people you worked with.
One of the NEVRO reps finally did some closer looking at the original paddle. She said that a number of the electrodes were burned out, possibly causing the lack of pain mitigation. I guess the use of a SCS is a hit and miss thing.