Windows 10: Announcing Windows 10 Mobile Insider Preview Build 10586.63 Mobile
I did have one crash shortly after installing. Since then everything has been running smooth.
Thanks Winuser. I hope Microsoft to release Windows 10 Mobile very soon!
IMHO it's definitely ready.
Huzzah, it's for 700+ series as well..
Source: Announcing Windows 10 Mobile Insider Preview Build 10586.36 | Windows Experience Blog
Source: Announcing Windows 10 Mobile Insider Preview Build 10586.29 | Windows Experience Blog
UPDATE: November 9th 2015