I have a Utopia backrest on my little Honda CTX700D, and I love it. I've said before, that is my commuter bike, which involves sitting at lights, stopping in traffic, and so on, and the support from the backrest has made all the difference in my riding, and frankly, I don't care how it looks. And passenger behind is no issue, and I would think it wouldn't matter how wide it is as far as the passenger goes -- just the nature of the horse. Like the dog with three legs, it becomes the new normal and they still wag their tail.