Automated. Someone on the barrier making sure you don't just leg it. Completely automated other than that (I think, can't see what these cameras are linked to but I swear I heard giggling when I picked up a tube of anal wart remover)
Only been in once, as a novelty. Flooded with cameras on the ceiling/soffit of the shop that must cover all products and areas. They track you, track what you pick up and then when you leave you swipe your card to get through the barrier.
You have no record of what you've paid or what the...