I have been using WhatsApp since 2016 and I have not been disappointed at all. This app allows you to connect with many friends at a time and connect with the group.
Our college group is also in WhatsApp where I get all the required messages of the college routine, timings, holidays and syllabus. The messages are encrypted, so no third gets the information about the content of my messages.
About the quality of the video call. It allows pretty well video calling quality. It runs even in very slow Internet and the data it consumes is so less that one can chat throughout day with only 100 mb or less mobile data.
So, with the features like working even in slow net, high quality video calling and the encrypted message. With the new features of story update. I truly recommend this app, if you are looking for a platform to connect with the friends, family and more.