if you want to see a heap of cons against paypal there's always this forum:
http://www.paypalsucks.com/newforums/
I've used paypal for a while now and have never experienced any problems with it. Just remember that they're not a bank, but they do operate with best interest. I think there's always going to be be some risks with any transaction. Historically however, using paypal has been a sound method for me.