I've used it, and really like the way it binds the fabric and batting together. I have Sullivans. It really stinks. I first used it inside in the kitchen at the bar. The overspray was awful. I had sticky overspray on my counter, on my floor, that took 6 mo to a year to remove. Since then, I've used it on portable tables over carpeted surfaces and outside on my deck.
I like it because I tend to get tucks on the backside of my quilt when I pin baste it. With the spray, I haven't had any tucks on the back of the quilt from quilting.
I've used the Sulky spray for machine embroidery. I don't remember any smell from that.