Payal is, um, horrible, but a standard paypal button is the simplest thing I've seen by a large margin. Just cut and paste. I just did a Stripe implementation.

Payal is, um, horrible, but a standard paypal button is the simplest thing I've seen by a large margin. Just cut and paste. I just did a Stripe implementation. It's pretty slick, but no more so than Braintree - although I will say the webhooks are a nice feature. The stripe benefit (over Braintree) is cost and not having to have to set up a merchant account. Never used Dwolla.