This version was very very instable for me. After the first start it crashed, second time, too, then it ran for a while. Set a course for work, then switched to Spotify. Minute later, switched back to Waze and it crashed right away. Started again, crashed again, before it could even send an error report (the message was displayed, then it crashed before I could tap one of the options).
Started again, this time it ran for a while, sent the error report. Switched to a different app again, switched back to Waze, and it crashed immediately. Restarted the iPhone, started Waze, crashed immediately. Stayed that way for the next 15 minutes or so (tried starting it 4 or 5 times).
Which was sad, because there was an accident on the Autobahn that had just happened, could have been the first to report it
Then started it when I was in the office, and it ran. Did send an error report, but then I didn't have time to go on testing.
My device: iPhone 4s with iOS 6.