I agree with @JeffSchwenk on this if you need to rate shop. If the client is a FedEx shop and they will do all shipping in FedEx, then Shipping Integration is an easy to use addition. The ODBC connection that FedEx and UPS has will import the shipping address into WorldShip and Ship Manager but there is no means of getting the tracking numbers, freight charges, weight, etc back into MAS. That is the niche that Shipping Integration from DSD comes in. I have implemented it 10 or 12 times and it works great for what it does. The people who sell and support are much better too.