Constantly break features. You have to add every person manually to a conference call. They should be able to call you and join. This is crazy for it to be so hard to add people to your group. The way they have it set up it is basically only for Skype to Skype users. Even if you pay the extra and have a phone number thru Skype and have payed for your minutes. If I could give it zero stars I would. There are tons of apps that will work for group chat as long as everyone has that same app. Skype should be set up for use without your participants having to be Skype users.