I just want to offer a counterpoint on PayPal.
I have never had a PayPal account, and I still had a problem with them that was inexcusable. I purchased something through a vendor that cleared the credit card transaction through PayPal. I had no idea that they would do this.
When I got the bill, there were three hundred duplicate charges on my bill. They all had some cryptic business name that included the word PayPal, plus some code for whatever the vendor was (and to be honest, I don't even know which vendor it was to this day). This should have been an easy matter to clear up, as it was obvious what had happened. When I contacted PayPal, they were not interested in helping out at all. They begrudgingly agreed to reverse a subset of the charges, but not all of them (seriously; it was like they admitted that they made a mistake, but thought that I should bear some of the cost).
I ended up going back to my own credit card company, which did charge backs for all but one of the transactions. I never want to deal with PayPal again. Ever.
My point is that most of the time, you are fine to use PayPal. But if you ever have a problem with them, they are not required to follow any of the rules that normal financial institutions do. They are known to make arbitrary decisions on occasion, and I have first hand knowledge of that. If you are ever on the wrong side of their error, heaven help you. They are definitely not your friend.