The 2 main issues that I see with model 3 are: 1. The long pano glass on model X causes a lot of distortion or ghosting effect, especially at night with others' lights (check out that thread). Tesla seem to be sticking their head in the sand about it. This could become a really huge issue for them considering the quantity of reservations. 2. The only solution to the heat and sun from the roof glass is a plastic filter that looks like a curtain. So long elegance. Not the biggest issue, but is that the state of the art? Other than that, big fan.