Stay away from Windows 10 insider builds.
I was using an insider build that worked okay, then tried upgrading to the next build in the "slow" track, and it completely broke my wifi, then I reverted back to the earlier insider build. So far, no real problems.
Then Microsoft decided that insider builds should expire, and become non-functional. You get a BSOD every 4 hours as a way of reminding you to not use old insider builds.
The built-in Windows Update for insider builds was also broken since I had been messing with registry settings for telemetry, and it refused to check for insider build updates.
So yeah, stay away unless you like broken wifi or BSODs every 4 hours.