I like that I can see all of my participants in one place, it's easy to set up, everyone gets into the room and they can hear each other without any problems. Nothing really, but you may not need this if your conference calls are small and don't have many people in them. It is great for larger conferences as well. This allows me to see who is online and make sure they are paying attention while also allowing me to focus more on my main presentation. I am able to be more organized which makes managing my time easier.