Best bike I've ever had for two upping......did a fair few long runs this year with Dani on the back, plus full vernatechs, tent and all the camping kit.
She was fine on the back....and apart from her legs being slightly cramped up (Dani's 5'10 ish) for long stints (which can ber solved easily with lowering kit for pillion pegs) enjoyed the ride.
I can also testify to how bloody good the ADV is in emergency situations with pillion and gear......as Andy lord will witness as he was riding behind us as I missed the indicators of a minivan infront of us and started going round the outside of him down a hill.....
One extremely large handlefull of brakes pulled us up perfectly, enabling me to slip behind him....I know that on any other bike I've ever ridden we'd have been off in a nasty fashion, if not worse.
When riding two up without the full kit on the back-rack, I did have to wrap my alaskan butt-pad once round the grab rail as it pressed on her coccyx....or I could have removed it easily enough. (didn't know coccyx's were removable did you

)
Dani also fell asleep several times, and for long distances, nicely wedged in on the back.
PS neither of us are, erm, how shall I put this delicately.......slightly built
HTH