Getting an overdraft is a pretty bad idea and should be avoided if possible. It would be far better to get your parents or someone similar to be there for you if you suddenly find yourself in a cash crisis. On the other hand, overdrafts offered by student bank accounts are quite "good", because they sometimes don't charge you interest on borrowing and other plusses, but this depends on the bank.
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Massive, epic adventure, multi-coloured, multi-layered.
Sort of two/three dimensional Wizard of Oz for the future.