Pros:

• This is an extension of our daily works, either at home, in the office or anywhere. If you don't have any internet connection, why not use this app for you to communicate with the others which are specified in a network? Hmm
• Really so helpful, I even used this before during college in it was like, yeah so helpful! Great!
• It is free which everyone most preferred to use!

Cons:

• None I can think as of the moment since this very helpful to everyone!!

Great hunt @truthsfinder, congratulations!! :)