Depends. If I have one item, in a sealed package w/ legible barcode in my hand, the self serve lane is fine. If I have produce, or a large basket of stuff lik

Depends. If I have one item, in a sealed package w/ legible barcode in my hand, the self serve lane is fine. If I have produce, or a large basket of stuff likely to contain a "processing error" in it somewhere, no way. Go for a real clerk.