I have used and seen OC spray used a ton over the years.

I hate it!

When you use it everybody feels it except on the determined turds that it seems to have no effect on at all. I have seen guys open their mouth when sprayed and ask for more. Many LEO'S don't even carry it any more.

I also dislike the taser but I would recommend that before OC but a handgun is still at the top of the list. A good shotgun being second.