Just had a nasty run in with the self service check outs in the Sainsburys Local. Damn thing kept complaining about "unexpected items in the bagging area" 
Nobody around to help and the one lady serving at the proper till just suggesting to the long queue that they use the self service tills!
I still think that most people would prefer to be served quickly by a human being, so to my mind this proliferation of Self service tills shows a disregard of customer service in favour of increased profits by the shops, grrrrrr
For example there is always a long queue for the served tills in WHSmith whilst a poor shop assistant attempts to encourage the queuers to use the self service tills. Nobody shifts,
Rant over.....