I have the voice working when you press the mic icon and in other apps like Hangouts and playstore when you want to use voice to navigate things in those apps. Just not on the home screen. I always find it amazing that platforms are built by Google when other previous ones are so wrought with bugs! Even today carriers and phones still do not have LP due to major bug issues and they want to move onto Android M LOL. Thats what bad car manufacturers do LOL!!!!!
It may only work on the M preview builds, everything is still beta pretty much on there so it's doubtful everything works correctly. I heard camera had some bugs and ok google on gnow was broke. Same stuff happened with the lollipop dev builds.
LEGALIZE IT.
Mattias Duarte ruined android. Material design sucks.