Now its 5years for me on whatsapp. It gives me a complete feeling so that if I will not use whatsapp a single day I feel something missing. Thats why I am in opinion that its an addictive app. Even at the time of study if any massage comes I usually try to read it immediately and I know a similar feeling is there in all whatsapp user. But at the same time it connects me with my family members and friends. It update time to time so it adds some more features to itself also. The recent feature of Deleting the massage permanently is my favourite. It happened to me several time before the update had came that I typed or forwarded massages of someone to other. Also it removes bugs time to time. So it is getting better and better.