I have been using facebook when I was in 11th class.This is really fantastic.My friend made my id on facebook.
Support and service: Its service is very good, whenever there is need to update, it shows the notification.You can connect with anyone in the world.You can make calls, chats.To make call or chat, there is fb messenger is given, you have to download it from playstore or 9apps.I have downloaded it from playstore.
Information depth and content: It provides all information regarding jobs, learning subjects and latest news and history.
There are various pages, posts for that.I joined those and time to time I get latest information related to jobs, study material.
security and privacy: It is secure if you are using all privacy measures.You can hide your photos, posts from unknown persons.
Time to load: It depends on your network speed.If you are using high speed network then it will take hardly 2-3 seconds to load.This app is user friendly and you can make a large circle of friends as a I have.