Well, my buddy bough a sat nav for his GS, not a Tomtom or any like that, it is some sort of nav he found in Amazon with touch screen and the lot. He is sending it back because is shite. On the other hand, I bought an iPhone 15 pro and we both went to the Bike Show in London. He ended up following me because his nav gadget kept crashing and my navigation via the app worked flawlessly. There has been one or two instances where I lost connection ( network coverage) and the app jumped from 3D maps to basic arrows, streets names and recommended lines, and after the signal came back so did the maps. Not disputing what other users are encountering but I believe is not the app but the phone network what lets it down sometimes if the coverage is poor.