http://www.greencarreports.com/news/1112679_life-with-tesla-model-s-assessing-my-new-100d-vs-old-2013-electric-carLife with Tesla Model S: assessing my new 100D vs old 2013 electric car
As the potential heating effect of the pano roof has been much argued about, here's his take:
*Glass roof: Although I love the panoramic overhead windshield of the Model X, the glass roof of the 100D, now standard on all versions of the Model S, disappointed.
First of all, it doesn’t extend forward enough to be part of the driver’s normal field of vision. So you don’t even notice it visually.
Second, it’s so darkly tinted that it triggers no sense of airiness or brighter ambient light in the car. (It’s so dark that I was able to view the recent solar eclipse through it while wearing two sets of sunglasses.)
And finally, on hot sunny days, it literally gets too hot to touch from the inside, radiating uncomfortably downward and adding tremendously to the air-conditioning load.