If you want to make a presentation or share your screen with far-flung colleagues, this is a smooth way to do it. The service doesn't require any heavy downloads by the people you're presenting to and, in our experience, there's little lag time.
Note: This service is available in a number of different levels with different prices. To survey the current offerings, please see the Fuze Inc.'s pricing list. The Download Now link takes you to the vendor's site, where you must register to download the software.