If I only have a handful of items, then yes. I have no problem with them whatsoever.
Speaking of which, this is one of my pet peeves: people who go through the self-serve lane with 150 items in their cart (even though it almost always says "15 items or less." At least in the stores where I shop.)
I saw one like that once.... I thought they couple was going to spend way more time in line doing it that way.