looking to see if anyone with experience with this combined surgery. I saw the head of spine surgery at HSS in NYC yesterday for a second opinion. Said my L5-S1 disc is very degenerated, herniated, and states it will most likley get worse. I also have some retro-spondylolisthsis, all which is contributing to my low back pain. States both procedures are done minimally invasive. About 6-7 hrs of surgery, sounds pretty intense. I only have one level disc herniation so would only need one level. Any one have this done??