The number of features available in one place, easy to use interface, and excellent customer support. There's nothing I dislike about Conference Caller. They make it so simple to set up a conference call. You can easily have multiple people from different locations connect into your call with no hassle or confusion. This makes for a much more efficient workflow! There are a lot of options out there now, but Conference Caller stands out to me as being easy to use, affordable, and reliable. We've been using this to talk to our clients, partners, and co-workers daily. It's made scheduling meetings and communicating easier than ever before.