As a Stripe customer I can attest to its simplicity: you have API that you call and that's it. You don't have to deal with any of the PCI stuff if you would do it in-house, just an SAQ once a year.
The back-end is also super simple and easy to set up antifraud rules and so on.
> Do you have 3d secure or whatever the marketing name is for it this week?
Stripe takes care of that for cards that are enrolled into 3D Secure (I think it is a Visa thing - the naming) and other kinds of card 2FA validation (Mastercard has their own and so on).
The back-end is also super simple and easy to set up antifraud rules and so on.