I barely ever return anything. I'm in a position where I have to be careful with my money, so I take as long as needed in selecting any items. I don't want to take the risk of not being able to return it for any reason. This makes me lose a lot of time in the shops but saves me a big headache afterwards. The only times I've returned/exchanged stuff is when my mum gets me something that doesn't fit or when I buy something that doesn't work (like appliances and such).