Yes I had the trial SCS (spinal cord stimulator) surgery and best advice I can share is do your homework. My trial was 10 days and I elected to have it removed.
My opinion (keep in mind this is my opinion based on my pain and everyone is different) the SCS is like "robbing Peter to pay Paul". I mean when you're having pain they instruct you to increase the "stimulations", so either you have pain or you're being shocked.
The best way I can describe it is if you're having pain in your back and I smash one of your fingers with a hammer, the immediate pain in the smashed finger will take away your back pain. But as soon as your pain leaves your finger your back will still be hurting. I hope that makes sense?
Keep in mind I had it done over 20 years ago and I'm sure the procedure has come a long way. Also depending where they place the leads you might be awake for the surgery, I was and I kept asking the doctors to please move the lights because they were burning my back.
You wont be able to turn, twist, bend over or do anything that moves your back in a twisting motion. I had to wear one of those stupid cone looking things you put on dogs after surgery, so you feel bad and you'll look stupid.
Again, this was only my experience so keep that in mind.
No, the SCS does nothing for your incontinence except make it absolutely impossible to change yourself!