[dlwiest]

The app can push notifications to your phone, which is nice for regular users, and it can merge with contacts to fill in blank pictures and provide more information. It's not essential, but some of the integration is nice.

[01Michael10]

If I every get Facebook notifications on my mobile phone you are authorized to shot me in the head...

[gamegoblin]

Some of my friends prefer FB message to SMS for some reason or another, and use it accordingly, so push is nice for that purpose.

[pavel_lishin]

I've started using FB messaging - I live in New York, in a basement, and frequently hang out in places with plenty of Wifi, but zero cell signal.

In that situation, I cannot send or receive SMS messages, but FB, etc., work just fine.

[gms7777]

I use FB message to communicate with friends in other countries. I know there are other apps out there for it, but when we all have Facebook already, its easier that way.