Will report back. In the past, I have always used Garmin, and I bought the 770 because I could update it while it was still in the van, on the drive, using the house modem, a simple press of a button. But operation-wise it was unreliable.
When we were away, I occasionally mounted the iPad on the dashboard as well as the Garmin, just to see which routes they would select. The Garmin would take you off a motorway...... and then bring you back on again. It was very lucky it didn’t end up out of the window! The iPad was quite sensible and reliable but there is no way to programme in height, length, weight etc and therefore suitable roads could not be guaranteed.