I tested it before 20 minutes because i was also interested. It's hardly to say but i don't realize any improvement since the first Nightly was released. Things only become more worse. Screen Mirroring still doesn't work, still sound crackeling on my device, display sometimes doesn't react if i press the homebutton and the display is off.
I also got a black screen during first configuration process after a complete clean fresh installation. I think it is useless to wait for a stable release of this rom. The much better solution is CM 13 by joshndroid.