Sounds nice, but the bottom line for me is that a typical $47 credit card sale, which always costs me $1.33 at PayPal, would cost me $1.66 at Stripe. Not much difference, true, but discouraging. I have no need of a fancy API, either--PayPal lets me specify the basics and fire off a simple Post from my PHP code. PayPal takes care of receiving financial information so I remain clean. Just my experience; yours may vary.