I tend to rely on Google maps for navigation, fixed camera warning and speed monitoring. The car's (any car's) speedometer is, purposefully I guess, inaccurate in the sense that the speed it displays is below your real speed, as shown on Google maps or similar. The higher the speed, the larger discrepancy. Lexus navigation trends to be accurate, but it simply reacts too slowly to events: it often tells you of a jam once you're already in it, rather than proactively re route you. Fixed camera warning is out of date... And too much of a pain to update manually when Google (or similar Waze) gets dynamically updated. Sent from my Galaxy Note 10 Plus using Tapatalk