How are the rear seats? Saw the S and X in a car show. Got in the rear of the S, holy crap, because of the battery underneath, as an adult you're basically squatting when you sit in the back (this guy is only partially sitting: https://youtu.be/XGjlSOGgDXI?t=28).
Edit: looking at some other car reviews, it seems it's a normal way to sit in the back, but in the Model S I felt like my knees were bent so much more.
I think you'll get the same feeling in the 3. But all indications are way more knee/head room than you'd expect. Not sure which one I'd rather have, but I also never sit in the back up my own car, and my kids are still in car seats.
I haven’t spent too much time back there since I have two little ones (in car seats) back there.
But I did sit back there when we first got it and was really surprised at how much head room there was. I think the extra head space might be due to the glass roof.
Edit: looking at some other car reviews, it seems it's a normal way to sit in the back, but in the Model S I felt like my knees were bent so much more.