I love using Shipstation as my shipping software for all my 3dcart website orders. I enter my orders and they are transmitted to my warehouse, who then does the shipping. Some of my orders are entered by customers but since my business is 99% wholesale, I am able to enter the orders myself and make sure they are entered correctly. Previously I had to rely on my (previous) warehouse to enter orders and there were very often mistakes. Since I check them myself now, there are no mistakes. Additionally, I was assigned an account manager by shipstation and she has been incredibly responsive and helpful. I wish 3d cart had someone to help me as much as shipstation does!! Once the orders ships, the tracking # is automatically attached to the order on my 3d Cart website, which is great. and the order automatically moves into the shipped orders area. The only thing that I would change about shipstation is that when and orders ships, I would like my customers to get an emailed invoice, complete with all pricing, shipping and total. Right now the system only allows me to email the customer the price of the products but not the shipping or total. I am hoping this will change over time. All in all, a great app to use in conjunction with 3d Cart. Highly recommend it.