A very good communication and real-time collaboration software. It is simple, fast, reliable, keeps history and the best feature of all is its intelligence. It can detect if a user is away from keyboard and auto changes the status to away. So in case one forgets to change his/her status, it auto changes the status to away.
Room for Improvement:
It seems that the software might in the future, support the software telephony exchange but at the current time, it is not doing that and because of that one key feature of real-time communication is missing from it.