The ability to track shipments using an API is great. I can easily get all of my shipment data into one place. It's not as easy to use as other tracking systems, but it works well for what I need it for. I'm able to see where my packages are at any given time. I also have the option to set alerts if something goes wrong with a package. I can't find out exactly when my package will arrive. If you're looking for a simple way to keep track of your shipments, this is the best option. We are solving the problem of keeping track of our shipments through the API.