I'm downloading it now.It's not there for everyone. The rollout seems to be only for a few regions so far.
TBH, I never noticed any issues with the previous version, 0400. So I'm not hesitant to upgrade to 0500.Currently i am at 0200 version not upgrade to 0400 affraying of several issues reports of previous version . I know that is too early for this version but i am curious to see if this ver will go smoother...
Might be something wrong with the iOS version if it has not been released on the Apple App Store.