It's already up and running on my phone. I know how to revert to 8.4( in the public beta program) I think I'll be fine, I just wanted to make sure it didn't have any deal breaking bugs like beta one's battery issues.It's a developer beta. So I wouldn't. Unless you're daily driving a new app you're developing using iOS 9 features.
The public beta will be a much better candidate for you.
I'm tempted to jailbresk but iOS 9 is so good...I'm using it as a daily driver on my iphone 6, loving it. beta 1 no it was horrible battery and heating issues. Beta 2 cleared all that up and is very smooth on my device.
The fact i refuse to restore to 8.3 for the jailbreak shows how nice iOS 9 is.
Haha, I used to go crazy flashing ROMs and kernels on my Nexus 4. I think it only stayed stock for a month and that was only because I was new to Android at the time and wanted to learn how to use it before modifying the systemPosted like a True Flasher--