Hi I'm new but wanted to write my experience. In Nov 27,2014 I had TLIF L5 S1 went well was bk to work in March 2015. I have to say during back to work started having sharp pain in lower back ,not able to sleep flat.after continued doctor visit ,the finally where able to determine it was my si joints. I ended up July 22, 2015 having a bilateral si joint fusion surgery with the ifuse implant. I have to say its been a week yes I'm walking alone I sit stand even drove yesterday.I'm very sore the pain comes an go but over all doing great. I plan on returning to work Aug 17,2015 lets hope .