i prefer Carty's Autoblogging Software/Autoblog Samurai over WP-Robot for the following reasons:
1) WP-Robot is a plugin while Carty's software is a desktop application. if you have 100+ autoblogs and you want to make a modification, you need to log into every single one of the blogs, one at a time, to add a new rss feed or whatever. having all the blogs in one place with a desktop application is much much easier to run lots of autoblogs
2) WP-Robot can only take content from sites that offer full rss feeds. Carty's software has an extremely advanced rss extraction process where it can take the link from a partial feed, go to that site, and extract the content. this means you have UNLIMITED sources of content, which makes autoblogging a lot easier
also, Carty's software is way cheaper. i got an email a couple days ago saying it was on sale for only $50, while last time i checked getting wp-robot with all the modules was like $200+. price isn't a huge factor though, cause both softwares are high-quality enough that you should be able to make that money back in no time if you use them correctly
You might want to compare WPR with blogsense WP before making your decision.
i have heard good things about blogsense but have never checked it out. can you elaborate on how it compares to wp-robot or carty's software?