[asteele-xr6]

Yes, I believe it is fine to use. I installed this build back on 14th May - and it has been very good. I use Android Auto regularly, and found it to be faster and more reliable than the official build 18025.

That update is just the core operating system, which is what you want... where you have to watch out is with updates that update everything in the Sync3 system, such as voice commands etc - which will end up breaking things if the download is not for your region. I install a North America build on my Australian system and lost voice command control of navigation. I have since installed a UK version, and that is working great.