I have used Paypal with Payflow Pro since they bought the services from Verisign. I have had absolutely no issues, and we process several high-value transactions daily from international clients. However, we only do credit card transactions, not direct Paypal transactions. I think this keeps Paypal out of our transaction issues with clients, and if we get charge-backs (rare) we deal directly with our Merchant bank which is alway dealt with in a way we find reasonable.