It was quite eye opening because I hadn't been aware how precarious the financial situation of people I see every day actually was.
We'd have manage due to access to credit.
I got my overdraft due to having a student account - it just hung around not being used for years on the account.
I got credit card mainly as then employers were being dicks - insisting I pay for hotel room abroad and then claim back - so I got one thinking it would be useful for on-line shopping.
I tried not to use them for years post kids but it's amazing how useful they are - to spread payments out - I'd try and wait even not get prescriptions for me waiting till I had more money but things like kids shoes if they went or school trip deadlines I felt couldn't wait.
I dip into the overdraft towards end of month and credit card is paid in full every month - but they are bloody useful and I think time I used them most SAHM with young kids when money was tight generally I'm not sure if I'd applied then I'd have actually got them.