I've been using it for a while. It has a ways to go, but they seem to be working on it.
-The article scraper and paragraph spinner is quit helpful...very fast way to hammer out content.
-The blog commenter is okay. Probably not as good as SB, but that is somewhat to be expected since they are going the all in one route instead of being perfect at any one thing.
-The article directory submission had some major problems. v0.61 supposedly fixes at least some of them. Haven't tried the new version yet.
-I've had crap luck with the social bookmark submitter so I've basically given up on that.
-The web directory submitter worked well. I used their provided list and got ~150 submissions without too much work.
-The web2.0 creation and posting need some work. There is no proxy support nor user agent spoofing. Not all of the web 2.0s create successfully. Not all of them can be posted to successfully either. Tumblr submission likes to post the same article over and over until you cancel it

. They know about all of these issues and fingers crossed they'll get fixed. The web2.0 stuff is what I was mainly looking forward to.
-They have some nice tools for keyword and competitive research. You can probably get similar info from other sources, but again, it's nice to have it all in one spot. Their "competitor crusher" is a way to grab backlinks from all your top competitors and then try to duplicate them.
I think that hits the main points of how I've been using the software. Hit me up if you have any specific questions.