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It's running fine for me. I set up as a new iPhone, so that may have helped.
 
Ios8 beta 1 is the most unstable IOS beta I have ever used.

Springboard randomly crashes.. I'm lucky if I can go 5 minuts without a crash. It even crashes in sleep mode. Opening facebook is the one consistent thing that I can do to crash springboard.

It also will freeze up on a black screen where the home and sleep buttons won't respond.. It ushualy u freezes after a few minuts.

I can only use voice to text once without closing the keyboard and relaunching it.

Battary life is not good.
 
iOS 8 beta 1 is awful on my iPad 3. So many app crashes, especially the stock ones when they get overloaded with things to do. And even starting it up is horrible. I boot it up, it just sits at a black screen for about 5 minutes, and then restarts, does that again, and restarts in to the OS finally. Keyboard letter popups don't work, and there's so many problems in the messages app. I might restore, or I might not who knows
 
5s has more issues when it comes to anything music then I would like to type out but it includes apple and non apple apps

Also double space doesn't do a period anymore

Text message constantly freezes and needs to be removed from multitask and restarted

And many more annoying things but I am well aware it is a beta and may have to back out till beta two or three on my main non dev devices
 
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