Well, before you buy it, try it with your companion.
Mono shock in rear will not give much travel with two adults on unit. However, I built a box around the rear luggage rack and padded a seat. I put three small children there. My 14 year old rides on the seat w/me. We all wear helmets and ya--we are overloaded. That's what we have. I go slow and the giggling is worth every penny.
If this is a serious rider you have then upgrade to a bike with more CC's & dual shocks in the rear.