The ease of using it as well makes things easier for me, plus I can chat whenever! It might be better if there's more features like chatting while doing office tasks or just when working remotely in my own place (though this doesn't really apply).
Still worth trying out though because its good at what they are supposed do so far i guess :) As much time spent by an individual user talking about issues/ideas over different topics could easily turn into hours which will ultimately increase productivity levels within your organization / institution etc..