I had my BTKR on 7/24. I was told in advance it would be a spinal. I've had a few surgeries in the past, always general, they worked out fine. The only thing that creeped me out about a spinal anesthesia was the word "spinal", and sticking a needle in my back, etc. While I was in the area outside of the actual surgery room, where the anesthesiologists and other people were, I was delayed a lot (due to other surgeries before mine), and was talking to the anesthesiologist about my concern. Naturally I was told not to worry.
And I can say that what actually happened was that I don't even remember getting that spinal needle or anything. One minute I'm laying around waiting until it was my turn, the next thing surgery was over and I was in recovery. I knew from reading about it (either here or elsewhere) that due to the spinal I wouldn't be able to move my toes etc. right away, that was kind of weird but not scary since it was expected. I also knew that they would be able to inject additional drugs through there to keep the pain away for a bit more. That all really seemed to work for me, no problems.
As an aside, I do mean to write up my experience and post on here. I read a lot before my surgery and learned a lot. Things are going OK (5 weeks post op today) but things didn't go as I planned, or thought they would.
Good luck.
Howard