BPEL: Links to synchronize a process flow

"link" is a construct to synchronize the BPEL process flow. However, for some unknown reasons, "link"s are lightly used in practice by most of the customers. One of the reason can be in its understanding and, other could be due to its usability. There is no specific UI icon in BPEL designer to represent the links. Its probably because, unlike other constructs, the artifacts related to links need to injected in multiple places. For example, First, a link needs to be defined, then source and target to the link needs to be defined. May be I should post an example covering it.