The documentation for download in the CBSubs downloads section is latest. I don't see how the manual is uninformative. It provides information on setting up plans, gateways, multiple use cases, etc.. perfectly fine.
At any rate Nick is hard at working upgrading all of our documentation for after CB 2.0 stable release. Maintaining detailed documentation just is not as simple as it seams; it's a massively time consuming task and we have a lot of products available that need documentation. So once redone they'll be distributed in a way that makes it easier for us to maintain (PDF is just not ideal anymore).
You can demo CBSubs frontend process at our below demo site.
demotemplate.cbdemosites.com/
After CB 2.0 stable release we've plans to consolidate all our demo sites under a single demo site that can be personalized further to demo the entire process, but I've no ETA on that.