I like that you can use it in house with your own people, or outsource to call centers around world if needed! The customer service isn't great sometimes but as long its not too bad i'm fine wiht them!! You need some good salespeople because they are very difficult ti get things done at times without getting yelled/threatened etc which happens quite often when dealing wth airpax from our side of business dealings (which has been resolved). It's just another option for an external PBX solution -