Maxtog, you were my inspiration for pursuing the Sargent low. Do you have a comfort report for passengers? My SO was not very happy with the Corbin. An when Mama isn't happy..., she won't go with me.
My main purpose in choosing the Sargent Low had nothing to do with aesthetics or comfort. Only that it was the lowest possible seat, which is what I required.... and was [is] far more important than any other factor.
The simple truth is that to make a seat low, it means less padding. And the seat can't be made much narrower, either. So, to a certain extent, a low seat is necessarily going to be less comfortable than one that is not a low. Of course there are a lot of other factors, I am just setting a generalization that seems to hold true.
In my case, I can barely manage the C14's height, even with lowering links, a low seat, and raised boots. It would be not only extremely difficult to carry a passenger, it would be very dangerous. As such, I never have, and never will. The passenger section of my seat is a Sargent Pod, a wonderful storage option. So I can't comment about comfort for a passenger on this seat. In fact, I can't even compare comfort for the driver compared to the STOCK seat, since I have never used it, because I can't.
I can say that I am not very comfortable- it is a little too hard and too wide for me (but as I said earlier, it can't be made any narrower- the width of the bike is a hard stop, and it can't be made much softer due to thickness). But like with most things, people's experiences will vary widely. I CAN say the seat has held up wonderfully, looks good, and functions well, although it is very difficult to attach/detach for some reason (and again, some people have the same problem, and others don't).