I'll throw more support in for Braintree. We use them, and they are great. Their customer vault API is simple, straightforward, and very effective. They've been

I'll throw more support in for Braintree. We use them, and they are great. Their customer vault API is simple, straightforward, and very effective. They've been quick, and their whole system just makes slightly more sense than the others. It's still credit cards, and it's still magic... just slightly less painful than other providers that I've used.