I like how easy it was to navigate through all my team members, even down as far deep into their history if needed! The interface could use some improvement but overall we love using this system for our teams in San Francisco/Sydney Australia!! We have several different departments within an organization (HR / Finance) so finding someone who can help us quickly gets tricky at times when searching from another department or looking up certain individuals' availability etc..
It's really helpful being able get everyone available across multiple locations together without having them spend time logging back int he office where they are currently working - no more emails asking people what hours suit best :).