I consdered it for one site but did not think of it as a csb replacement in the same sence of something that operates similarly to csb. It is it's own thing and could work well for some types of sites and some types of designers.
It seemed a little too complex to be so creatively restrictive for what I was considering to build so I didn't choose it myself. But that doesn't mean it might not be right for you. It also doesn't mean I might nto choose it for certain types of sites in the future.
I did try it out. I'm sticking with Site Spinner for now on all of the sites I have recently built and am working on.