I'n 6'6" as well. I have a Model S. Entering and exiting are a bit of a challenge but I've decided that one doesn't get into a Model S, s/he puts it on and wears it. Very comfortable for me to drive. I don't drive with the seat all the way back so my daughter has no problem sitting behind me. I found the room in the Model 3 pretty similar but believe it may not have as much leg room if the seat is to be all the way back.