I have an order for a Model X, but the salesperson persuaded me to try a Model S P85+ for a spin and I rather liked it. However, I'd only be interested in getting the ModelS if I could put the kids in the 3rd row, and I'm not sure they'd work for us. My concerns are that the kids will get motion sick from riding backwards, and that the occupants in the rear seats will get hot or cold because of the lack of shade in the back along with the weak airflow. Now, I live in Toronto, not Texas, so I don't expect heat to be an issue for me too many days in the year, but I also don't want to get a car where my kids don't want to ride in because they get sick in it. Can someone with kids who uses the 3rd row comment on the day-to-day usability of those seats? Thanks in advance.