We have never been really hassled over an upgrade, usually the subject may be mentioned (eg "Today we have a special offer of upgrading to a SUV for just xx a day"), but usually just a "No thank you the car we have booked will be fine" ends the subject. We have also never had any upgrade hassles over insurance as we always go fully inclusive and don't book fly-drive holidays.

Well done Chris on acknowledging the good service, we all appreciate a pat on the back, I just wish more people were like-minded.