Well Colleen.....I too didnt have any bad experience with the trial....
I was in overnight. Was awake for the procedure, well sedated, but enough to block out what was happening but yet to be 'awake' to let my Consultant know where I was feeling the stimulation.
Then when I was back in the ward the Rep came and went through all the programmes with me. I had 3 programmes. Found it of great benefit immediately. I only had the trial for about 3 days, if my memory serves me well, well it was over two and a half years ago now

where does the time go!!! but I knew straight away that this was going to work...
I know everyone has a different experience and their level of pain management is different but as the others have said they too didnt have a bad experience. I trust and pray that yours will be the same AND that you will get great benefit from it too.......
Take care and look after yourself
Jackie