DH & I have now cut up all our credit cards and are looking at using Visa Debit card instead of our ordinary bank account (to try and save on fees).

Can someone please tell me about them? I've looked on the bank's website and it's more promotional than helpful. I'm just trying to get my head around them before we go to the bank in the next few days.

What good/bad about them? What is the basic idea of them?

Many Thanks,
Dan.