Just be careful after using PayPal to go back to the PayPal website and log yourself off. Since eBay bought PayPal, I notice that I cannot rely on being automatically logged out after a certain period of time. Even if PayPal is not in one of my open tabs, I can still be logged into it! I'm pretty sure this is how some hackers got to our credit cards last year. Now I am careful to check and log myself out if still logged in (which is most of the time).
But really, what I am hacked off about now is that PayPal did not give me the option to choose a credit card payment. I'm thinking it's because I checked out with the whole cart. When I have purchased just a single item before with Buy It Now, PayPal has always given me the opportunity to change the payment method.