The customer service has been top notch. It's easy to use. They have the best software out there for shipping rates. I had a problem last week and they were able to resolve it right away. No complaints at all. The only thing that I've noticed that I don't like about this program is their lack of a mobile app. This makes me wish that they would make one so that we could actually see what is being shipped from our website. We are using Outsource Shipping & Order Fulfillment to fulfill orders for our website. It saves us time and money by having someone else handle the actual shipping part.