I've used self checkout about 10 times. The first time took forever because I didn't know they were weighing my goods. Maybe the 4th or 5th time was slow because I bought produce and it took a long time to find the goods. After that when I had produce I just waited in lines for a clerk and when I went to the self-checkout it was very quick (just because the no lines, not because I'm quick at checking out). If there's no line or a short line for a clerk I just wait in line.