The features of BizTalk Server I have found the most valuable include all the connectivity to systems such as SAP and others. It is sometimes a complicated system, but you can do almost everything with it. BizTalk Server offers workflow functionality that I find very effective for process automation. They call it orchestrations where you can define logic for integrating systems. Regarding the adapter framework in BizTalk Server, I usually work with standard features. You have a tool called BizTalk Mapper, where you can define the mappings between different formats. It's less about programming on the very low level; it's rather doing configuration on a higher level.
