We've done a LOT of research when it comes to integrating Stripe with WordPress, and I can state unequivocally that Billflow is the best I've come across for our needs.
The plugin itself is icing on the cake. It's backed by Billflow's ease of implementation, robust feature set, and some of the best support I've experienced.
One of the key WP features is that you can create users when a Stripe customer is created, or you can use your existing method for authenticating users.
Remember, this plugin must be used in conjunction with your Billflow account. (Don't simply download the plugin and suddenly expect to process Stripe payments. :-))
Well-done to the team at Billflow! I hope you guys make a ton of money along the way while helping all of us do the same. 😀 Honored to leave this first review!