I had one from when I was a student. I didn't need it as a student but I used to take out the max amount as it was free and put it into savings - only a few pounds in interest but better than nothing. I did use the overdraft for our wedding though, which was when I stopped being a student. After that, I just stayed in it but wasn't increasing it. When they started charging interest I decided to pay it off so I opened a new current account and had my income paid into that, then each month I paid off some of the overdraft each month. It was only by keeping the money separate and not using the card from my account with the overdraft that I was able to start paying it off.