In reply to Kemics:
I'm only 5'6 and I think it would be difficult to stretch out fully in my 2012 model - though I've never tried it . I've got the boot levelling kit, and the rear seats do not fold flat unless you flip the rear seat squab - however doing that reduces the effective length of the platform.
My older 2003 model had an even shorter wheelbase so would have been more of a squeeze.
The Superb looks to be the canines gonads in that respect.