Depends on your driving position too. I have a buddy that is shorter than me but drives like he's half way in the back seat. You can see his head from the rear door window lol
I'm 5'10 myself and i find the room in the back plentiful. Its much bigger than my E90 was.
2014 LCI 550i M Sport | 3D Design Front Spoiler | BMW Performance Black Kidney Grills | BMW Performance Trunk Spoiler | BMW Performance Gloss Black Diffuser | Painted Reflectors | Wincos 30% Tint | Supersprint Quad Exhaust | AC Schnitzer Springs | MORR VS8.2 Brushed Finished Wheels 20x10R and 20x9F | Michelin PSS Tires 245/35/20F 285/30/20R | M550d 16mm RSB |||More Photos of my car here|||