I'm currently running WP RSS Aggregato wit no add ons on [ link redacted, please do not post links in reviews ]
The plugin was easy to setup and make it work, however I had issues on my side.
I had a personal easy correspondence e-mail to e-mail with thier customer care people, and afetr a few weeks (I was so slow) I finaly got everything under control.
They were nice, easy to deal with.
I give 5 star rating for thier customer care