Do you think having a personal shopper shopping for you is a good thing?

  Nope. It might work for some people, just not the ol' Randibilous. 
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For ME? Not a chance. My sister shops for an older woman that cannot drive and can barely walk, so for some it is a good thing.

It works for some people.

Only for the partially sighted, disabled people have special wheelchair trolleys, well off people have staff to do it or order it, online shopping can be delivered, I shop to get the best bargains and reduced items its very satisfying, bit I don't think getting some one to do it for you is food. Unless of course you take it in turns?