I'm 6'4" and my son is 6'6" and we fit in ok
Iv'e driven all the way to Newcastle in the Z with one short stop and was absolutely fine, in fact arrived relaxed, not tired and certainly not in any discomfort.
I have the seat all the way back, tilted so I am sitting right back and at quite an angle, and steering wheel almost down as far as it goes, works for me
I find the leg room is great, I can stretch my left foot right out on the foot rest.
I do tend to kind of slouch down a bit instead of sitting bolt upright but as I say works for me