some love it - most dont!
Not the most comfortable seat to pillion on, might be worth sourcing a Corbin seat, as much more comfy.
My daughter (5ft & 7 stone) has pillioned on odd occasions in the past with me, and said she would have been more comfy on a 748/R1 or similar
as 'numb bum' set in after about 50 miles or so - otherwise was ok for the short trips.
That said, one of the guys in the UKMOC takes his bird on the back over some long disances (200 milers) & she seems quite happy
C