I am so sorry for the struggle you are having to endure to get the SCS approval from WC. I firmly believe they do this crap 100% on purpose to try and get you to give up. I have had a Medtronics SCS for about 10 years, and although I did not have the approval problems you are having (My private health ins. paid for it), I am one of the Murphy's Law type people, anything that can go wrong will, and despite on-going issues that I will not go into right now because the chance of them happening to you are so miniscual, and despite the fact that it only gives me 10 - 25% pain relief, I would do it again in a heartbeat.
I have had many people ask me why I just don't give it up and be done with it, but honestly, a lot of the time it is the difference between me being able to get through a bad pain day at home, or having to go to the ER, and to me, that is worth it.
I know that most people get much more relief from it than I do, and I truly pray that you are one of those people who get a terrific amount of pain relief. I just wanted to let you know from someone whose got one that I feel it is worth the fight.
Hang in there,