I used it, didn't work for me but I do believe it could work. I had a very strange situation that I don't believe is very common. Baby was 10 pounds and too large to get into position. After finding out my baby was a 10 pounder I was actually relieved to have had a c-section. His shoulders were almost too big for the incision the dr made. I think I lucked out even though I didn't get the natural birth I wanted.
Either way, you get your baby and everything will be great but I would give the "baby come out" track a try and do what you can to go into labor on your own. Good luck!