[Groxx]

Yeah, I think the "rude to customers" thing (I've heard it too) is far too focused on the act of rudeness rather than the effects (unhappiness / lower retention).

Self-checkouts trade one kind of unhappiness for another, and many (most?) are horrifying experiences. There are a few that are reasonably quick and user-friendly, but certainly not all. Most seem to be scraping the bottom of the barrel in an effort to squeeze a few more $ off the purchase price.