This may have been discussed here before, however, only three months in, and I already have my first rock-ding on my front windshild from a big-rig on the freeway.
Regardless, I have owned a few sportcars that had low-angle windshields, like we have on the Model S, and they are highly suseptable to rock-dings. With the cost to fix windshild dings and cracks, and or full windshild replacement, has anyone installed this product on your MS yet (or past cars)?... http://www.clearplex.com/windshield-protection-film-clearplex-product.php
Also, I am noticing a fair amout of heat on my body from the angle of the windshild, and distance it goes back. In mid-day here in So California, I tend to get hit with some serious sun up to my chest and arms (and it's still winter), so I am also thinking this product might help cut down on the heavy UV / UVB and heat rays.