Amazon MCF and Buy with Prime

We've been using this for a few months while we switched 3PL providers- customers love the fast shipping and since we already have inventory in Amazon its a no-brainer. We just added buy with prime and found our conversion rates improved due to the simplicity and speed that customers receive the orders. We are are not going back! Its important to note you don't pay amazon any fees other than fulfillment so it's actually cheaper than our regular 3PL for faster service.