Advanced Shipping Rate Manager

Excellent customer support. We use multiple different apps to run our storesite, but most do not offer the type of support I always get from ASM. I didn't have to wait 24 hrs for a response, as a matter of fact, they offered to call and work with me through the issue in less than 5 minutes of contacting their support team. They care about their customers and it shows. Have been using this app for years now and have always had the same great experience.