Absolutely ruined by latest update. Navigation changed my route 27 times in one journey, including 3 times at one set of traffic lights. Twenty. Seven. Times. App offers an alternative route (down a closed road) and helpfully says to press the "no thanks" button to decline the offer. No such button exists. Your only option is to wait for the app to change your route automatically and then manually select your old route again afterwards, only for the app to change you again five seconds later!