The simplicity of adding and removong feedback.

Complete traceability of the Goals and objectives captured... One can even schedule the one on one meetings with the reporting members and email followup keeps monitoring in check

The review process gives us an insight and clarity about where we are currently, what are we doing, how much of our skill sets are being put to use, what do you think your next step should be and also helps as a reference book to keep a track on your progress in the organization, your personal growth and advancements. Giving reviews of your peers also helps you understand what other opportunities can be available and what are the various demands of different roles.