I have done 100 kilometers with my girlfriend. She weights about the same as me, 70 kilo's. Riding with a duo passenger is very different. The bike's natural behaviour is sporty as you guys know, it's light. With two passengers, the bike behaves okay. Still, you've got to ride like you would ride a bigger chopper, easy and not steep into the corners. For what suspension is, it's ok. I've been riding with a fender illuminator that I thought was going to hit the rear wheel. That didn't happend though.
I did not make any adjustments to the suspension.