Article Submission is something which i found really useful for getting good SERP, I checked this many times, I tracked my keyword Positioning on google and made 100 Submissions. In time of 7-15 days I found boost in my SERP for all promoted keywords. Cause of just Article Submission I am on Top of many very Popular health keywords. However I cant reveal them Advice for all, submitting by software is like playing with fire.. Once google will find.. it will be -ve for your site. Do it manually.. I will suggest use Robo Form for filling Article details, there are 2-3 plugins for entering details which will save your site for sure. Its time taking but effective. 1 More thing Submission with spin will be better than plain submission.