The concept of this app is very nice, the idea of instant messenging has a knack of addicting users to it and with VOIP added to it this app just beat every one in its segment. The layout also is very user friendly and the regular updates also help in meeting with the chainging demands of the users. The functions such as sendind realtime location, images, documents and every thing and kind of file makes it suitable for casual messenging and urgent communication. Its so very useful.