Tough crowd here today...it was a hand-me-down, seriously. But yes, I have heard these comments before
OP, not sure what you mean re seat belt tie in? The part that goes over the headrest is an integral part of the baby seat and it hooks to a built in "anchor" at the back of the tesla back seat. Once the baby seat is in place, there is no room for that "over the head rest" strap to slide even 1/10th of an inch.