The Garmin guiding you to the hotel front in Florence, Italy is amazing! I would call it a miracle. Just got back and we used a BMW nav - it was terrible!
You hit all the points and I agree with you on the Lexus Nav. Another disadvantage is someone calling (bluetooth connected) while you are trying to find your destination via Lexus Navigation and poof there goes the map and the guidance voice. If you do push the Map button, you'll get the map back on screen but no voice. At least with the Garmin your guidance is not interrupted - no missed turns.
