Went ahead and purchased the premium product of this and Lorenzo provided some support at the beginning. However, when the plugin was not properly functioning with our site. The rates were off. Since then, I’ve sent multiple requests for help and at this point asked for a refund. However, no response. Hmmm…I even asked politely if I could possibly exchange this plugin for the EasyPost plugin, and again, no response. If you go to the website, there are all five star reviews and that's because the developer has to approve of the reviews.