I've refused, flat OUT. I smoke a LOT of weed to help stay off the opiates. Some days, I have to use them. Have you had it already or are you getting ready to go have it done? I'll look for an update, I do hope it works for you.
I had 2 of them. They hurt, but not as badly as I thought they would. They didn't help me any, and I ended up having surgery that didn't work either. But each case is different.