Geez, where do I begin... My trial SCS is coming out tomorrow. This will have been my second trial, first one was about two years ago......it was not successful. That was a Medtronic unit, the current one is some top of the line unit that Boston Scientific makes. It's been better overall, but I don't know how to decide if I should have it permanently implanted. I'm fused from L4 to S1 and had a kyphoplasty procedure done on T12.... Two separate injuries and I hurt in both places. After meeting with the rep to readjust the unit today the sensation has changed. It's almost like pressure instead of tingling in my mid back. He worked with me for an hour and frankly seemed a little baffled. Said "your back has really been messed up." Basically it took a long time to get the unit working right and lots of energy (current) in some areas and very little in others. Has anyone else had a hard time getting their units programmed right? How different was the permanent unit from the trial?