That woman always seems to be in front of me...
Working in a shop myself, I find them dead easy to use (although frustratingly slow), but I always end up stuck behind somebody who hasn't quite realised that it's the black and white stripes they need to scan, so spend a few minutes waving the ingredients list over the scanner.

I suggested to somebody in our local Tesco that they should amend the signs to read "10 items or fewer; Minimum IQ: 100" She had no sense of humour.
(moogal has eggs, Fri 28 Dec 2007, 4:40, Reply)