Kowan on 01 December 2013
It's pretty accurate and fast from what I've seen. Although it's rather limited in commands, for example I think you can't use voice commands on the xmb? or the menu other than the dynamic menu.There are a lot of youtube videos of people using voice commands on their ps4. A simple search on youtube would show you enough.
http://www.youtube.com/watch?v=zmz5QxOpf7k
