WhatsApp has seen lots of iterations and modifications and always presented us with the most easiest and reliable way of communication.
Initially there were many glitch related issues while sending and receiving photos and other media files in it but they have already fixed it during their updates.This has also been a great boon for students trying to complete their assignments.
The security features that they introduced are very helpful while contacting an unknown person.It has proven itself to be a very good means of data sharing but still improvements are required in saving the back up on google drive, rest assured its very much recommendable to people who have a smartphone.