I had some problems with using PayPal to trade BTC involving the Charge Back issues. When I tried to fight the charge backs, PayPal told me they did not support Bitcoin sales as it was "an intangible asset." So I lost the charge back fight and had my account limited for 30 days. For BTC I now use Payza. No problems with Payza yet, besides the service being extremely slow for US customers. Live and Learn! :-)