They made me cancel my reservation. I'm very sensitive to ergonomics and I like to sit up straight. Same with my girlfriend and my parents. If they eventually release a Model 3 with a *straighter* headrest, I'll get one.
This headrest makes it impossible to sit up straight with your back against the seat without bending your neck far forward. It would require massive alterations to the seat to be ergonomic; as it is it's bad for your back and neck, and my physical therapist wouldn't approve.
That might have been me.
I bought my Model S without ever test driving it, but I did go to a showroom and sit in the seat to make sure it was OK. Did the same with Model 3, but the seat was no good. :shrug: