Integration with other MS products such as outlook, OWA, SharePoint
Support for various client devices, gateways etc.
Support for federation with third party.Lync Client allows users access to presence, instant messaging, voice, audio, video, and Web conferencing
Room for Improvement:
Voice telephony and video calls utilize lots of bandwidth.
It's is a very good product to have -- a solution for IM, voice telephony and video communication bundled into one.
Disclosure: I am a real user, and this review is based on my own experience and opinions.
Feb 20 2013