Been sprayed 3 times working for various law enforcement agencies. This stuff works really well. However the first time was the worse for me...the spray works physically on people, mucous membranes, eyes, etc. It also has psychological ramifications. Yeah, it's nasty...
For all you that want hot sauce, here is a very difinitive list. I wish I had the money and the balls to try some of that stuff, but it just doesn't look like fun.