We buy most of our produce at Costco or something, where we avoid the self-checkout. At the grocery store, we'll usually only get a couple produce items and the rest will be stuff we can't reasonably get at Costco, like snacks, drinks, etc, and most of those have bar codes. If we have a bunch of produce or a full cart in general, I'll get the cashier, but 9/10 times, we'll take self checkout since it's faster.