My iphone 5s has started to freeze after the first time i snooze it. So I can end up snoozing a second time to wake up an hour later to see the snooze word on the lock screen. Very annoying...
I find activator betas aren't really a problem and if they are, roll back to the public version
Some app's betas versions are buggy though. For example, the earlier versions of beta for biteSMS for iOS 7 (but that had more to do with the iOS 7 version was built from scratch while activator is built up on a working version). It's much more stable now, even though it's in beta
Even couria (which I believe is still in beta) or flex 2 beta (which now sees a public release) seemed pretty stable and solid