WOW, that is a must have feature in any phone. I'm going to go buy 14 iPhone 6's just because of this incredibly useful feature. I'm so glad Apple made me aware of this.
If only there was some kind of way to communicate with people using our voices, in a conversation of sorts, using these devices.
I guess that's why NOBODY uses HeyTell or WhatsApp or TiKL right??
Because it is sooooo useless to send bursts of audio??
/sarcasm
Apple quite cleverly overcame a lot of the issues with these audio text apps... the primary one being that the audio clips are stored & can fill your device with useless data.. in the Apple incarnation, they self delete in a few minutes.