In this review, Robin does an excellent job of describing PlumX and what it does. Her conclusion is:
PlumX is a powerful tool: both the data and the user interface can support multiple use cases and research questions. For example, Oregon Health & Science University (OHSU) Library is exploring how to use PlumX to help individual researchers uncover the full impact of their work, especially among different populations. OHSU wants to enable researchers to tell more nuanced stories about their science, especially in the context of funding proposals and the new biosketch format that the National Institutes of Health is piloting.
To read the whole review go here.
To request more information about PlumX go here.