Well, it's not as low as a Vette, but it's low. I live in downtown Houston. The streets have been re-paved many times creating valleys where pavement ends and driveways begin. My front end scrapes all of the time. Sometimes on approach, I can enter at an angle, but egress due to traffic will call for me to make a head on approach. In that case, the front scrapes every time. I have had my front bumper replaced once already and I have a scratch on my new one. The sensors do help, but what would be better is just one more inch of clearance. My Porsche can be raised up when you find yourself in this situation as could my CLS. Also, my car is white, so each scratch shows up black.
BTW, my last 6 had a mangled underside when I traded it in, so this is not a new problem.
Parking curbs usually are ok, but when you pull up to a sidewalk that doubles as a parking stop you better beware. The long front overhang adds to the issue stated above, so an Aston by comparison probably wouldn't be as easy to scrape but they have no sensors.
All in all, I'd buy it again but I wish the front end angled up just a bit.