I has a discogram 6 months ago. The proceedure worked well for me. It recreated my symptoms perfectly, showing that surgury would work. It's a painful proceedure but you'll be fine a couple days. And if your like me the pain won't be so bad, because you'll know they finally found the problem.
I had a L4,L5,S1 spinal fussion on 3/8/07, so far no regrets. I'm having some numbness in my legs, but that was do to having to move nerved around, and also to decompressing nerves that have been pinched for 7 years.
If you have any other questions, just let me know!