Allows for loosely typed, and loosely coupled systems. Transport and Application are separate

Changes to the data sent in the payload do not necessarily change the WSDL. Meaning the web service does not change because the schema changed.

All transport traffic is going through one end point. This could potentially have scalability issues depending on the amount of data that is coming into the system.

Implementers will need to implement routing and extraction code in order to determine what to do with the payload received.

Need to implement logic in order to handle contents that are not understood.

Need to negotiate out of band using other services to describe what payloads are understood and handled by a particular trading partner.