Using paypal

I've never used paypal, but I want to spend $20 on a gaming website membership. There seems to be an option where you can use paypal, even though you don't have an account. You have to enter credit card details. I'm wondering;
has anyone ever used paypal in this way, i.e. with no paypal account. If so, was everything ok? No hidden fees or strange extra payments taken from your credit card?
has anyone ever used paypal in this way, i.e. with no paypal account. If so, was everything ok? No hidden fees or strange extra payments taken from your credit card?