I've been using WordPress as a web building tool for over 5 years. During this time I've installed/activated (and deactivated) countless plugins. This plugin won't be deactivated on my site anytime soon.
For me, bizXpress is *more* than a plugin -- It gets a *great* rating because it's focused on the right elements ... 1) a method for building an online business (thanks to the written and video guides), 2) supporting resources like the tips and techniques articles and 3) community support from the forums that have scores of helpful posts and topics.
I agree with others that some additional functionality could be incorporated directly into my site - (e.g. linking keywords from the master keyword list to pages/posts so I can keep track of the content I'm publishing)