any yoga ball stories?

I know it helps get baby into a good position to bounce and roll your hips on one, but any successful labor stories from using a yoga ball? 
I started using one last night and have had slight cramping and tightening all day today along with some spotting this morning, but nothing consistent yet. And I've noticed that she has DEFINIETLEY dropped since last night... like - it's super obvious she is lower! Today's her due date. Doing whatever I can in hopes something helps move things along!!