I like everything about this product but specifically call quality which has always been great! Callers pick up immediately when they answer their phone so no one hangs up before you can say hello. This service works well if there's more than 1 person using it at once because everyone hears each other clearly. Sometimes multiple people use my phone line simultaneously resulting in some bad experiences for me personally - the caller gets frustrated and hungs up while trying to explain what happened. So I've resorted to just letting them know "I'll be getting back to YOU shortly". No personal attacks here :D.