I am using Instagram since 1 year and during this period I have uninsalled every other social media app such as facebook and whatsapp because I personally feel this is the best one.
They have the most minimum lags and always brings something new for best experience for its users. Plus the service and support is very nice.
The app is higly user friendly and takes a reasonable time to load if you have a slow connection.
The chat options are good but stickers are absent. Sharing of photos and videos is pretty easy.
Instagram is the best time killer with better contents than facebook.
And if u follow any stars then insta is the best place for you as almost every one uses it.