We are still in implementation phase but our new office is 100% on the fuze and it is being implemented @ all locations. It saves a physical phone @ users desk, portable work number and having application on your computer is easy to use and manage. Huge savings on the cost too.
Initial stage users were reluctant to adopt. But after using it, they love the flexibility and quality. It saves money on recurring costs of managing different phone systems across the globe and also saves support and management cost.