As a few on my team are eager to upate, I'm limiting how many devices until I get some good feedback...we've been burned on that before. Please post your feedback on this build.
How is the stability with apps that have not been updated yet?
I'm looking for the same thing. Trying now on an iPod touch...
Third party apps from iPad Air running iOS 9b1 :
MLB At Bat - Playing video crashes app after ~1 second of playback.
Overcast - Crash on launch
August Lock - Unable to establish BTLE connection to lock
1Password Extension (in Safari) - Unstable unlocking keychain, took multiple attempts
As usual use caution and install on secondary device if possible.
My iPod touch seemingly has no issues. Although it's always been "slow" in comparison to my iPhone, so it's hard to tell if that's an IOS 9 thing causing slowness additional sluggishness or just the fact its a 5th gen A5...