I use the paid version of Isnare because they submit my articles to a multitude of article directories, My experience with them and article marketers who does the same thing has increased my page rank and traffic. I know there is controversy about doing this because article directories have so many safe gaurds to prevent any kind of automated submission, however with these 2 sites things have gone well so I am looking for a new one. Both isnare make it possible to space the submissions out so it looks natural so that is important to me. The cheaper the better.