I find that since both headrests on the front seats are non-adjustable, they are very uncomfortable. The seat back position is fine for me--I like to sit up fairly straight. Pilot's front seats adjust more upright than the old Accords.
Well we were all set to purchase a 2017 Pilot until my wife sat in the driver's seat of a 2016. She is a slender 5 foot 1 inch woman and no matter how we attempted to adjust the seat and steering wheel it just wasn't comfortable for her. Either she had trouble reaching the pedals or the front of the seat cut into the back of her legs. She was to be the principal driver of the new vehicle so we had to give up on the purchase.