Lots of good advice posted above. I have tried most Satnavs over the years up to and including Nav 6. I now use a Tomtom 550 on my classic and modern BMW with a back-up on the phone of the Waze App if required (Tomtom has never let us down) which I find the best phone navigation app in this country and Europe. I even use Waze through Apple car play on my brand new 911, much better than the Porsche system. Certainly for Europe I would have a dedicated Nav unit for primary use with a phone back-up.
