When I bought my bike, the lady behind the counter asked me if I would like any accessories. I mentioned that I would like to have a backrest with the little rack on it but that it didn't really matter to me. Well, when I picked my bike up, it came with a backrest. I didn't officially ask for it. But hey, you can't beat free.
I've taken my wife for one ride on this bike and she appreciated the sissy-bar. (She would have ridden with me more often but we had just found out that we were pregnant.)
When I purchased my rear trunk, I needed a place to put it and that tiny excuse for a rear rack on the sissy bar wasn't enough space to mount the base due it's close proximity and the angle of the backrest. So, I just sawed the backrest flush with the rack and used the hinge area of the luggage box as a backrest. It works out quite well.
It's hard to see in this photo but you can get an idea of what I'm talking about.
In this photo, you can see the pad on the hinged area of the luggage box that serves as a new backrest.
