I love self-check-out (SCO). In fact, I haven't visited a manned lane in years. I should note however that I rarely have more than ten or fifteen items.
Delaware ShopRites converted to 100% SCO about a year ago. Customers complained and the stores' owner recently announced they would be reverting to the past. They said "we listened" but skeptics said they were experiencing higher than normal losses. So ... there is hope for those of you who like manned checkouts.