I am a smidgen under 6-3 and my height is proportionate between my legs and back. I had to get Abby at Flightline Interiors (she has the contract to make the seat cushions on the 12) to make me a seat bottom cushion 2" thinner than standard for me to clear the canopy. I also lean my seatback as far back as it will go. Even with all that, I only have a little clearance between my headphones and the canopy. You could still shave another inch off my cushion and still have some padding. I love the plane even so!
Legroom is very good and comfortable. My longest flight to date is 1.6 hr and no discomfort.
Larry