Our jail folks use OC multiple times a month and it almost always works. We did have one 6' 6" 280 pound new committal several years ago that had three cans emptied on him with no apparent effect. He was eventually placed into the restraint chair until he settled down. He was fine after that. A discussion about acquiring Tasers came soon afterwards, but nothing came from the discussions. We do have stun cuffs to place on inmate court defendants that have exhibited assaultive behavior toward staff. There has been no need to actually "push the button" yet because we test the unit in the inmate's presence before putting it on them. They don't seem to want any of it.....