(http://i57.tinypic.com/2iw1q2q.jpg)
Last week, Microsoft released three new builds. The company released Build 10158 (http://www.windows10newsinfo.com/smf/index.php/topic,29758.0.html), 10159 (http://www.windows10newsinfo.com/smf/index.php/topic,29763.0.html) and 10162 (http://www.windows10newsinfo.com/smf/index.php/topic,29777.0.html) to Insiders. All of the builds include a bunch of new features and improvements. As Microsoft is getting closer to the release date of Windows 10, the builds are pretty stable and pretty good.
Personally, I think these builds are really good for performance, user experience and battery life.
source:microsoft-news