I've kept up my Arizona CC for umpteen years since they first offered it. You don't really need it in AZ as the carry laws are pretty liberal but I want it for out of state. Though it can come in handy in AZ. I was driving home one night from Douglas in the farm dually wearing a coat and tie as I was going home from Lodge and a BP pulled me over. As he looked in the window he asked if there was something I wanted to tell him. I hadn't a clue what he was talking about and I followed his eyes...my pistol was on the passenger seat, all perfectly legal of course but showing him my conceal carry card eleminated any discussion.
He had no probable cause to pull me over... although maybe the pollero uniform for that night was formal.