I use it. I just get the directory links from the software and I manually submit to it... All 300 directories...
Another satisfied customer here.. I wrote a bit about it on my blog here. Its really cool. Regarding the payment questions: You can pay $15 , and it'll allow you to submit your site to all 1,000 directories. Depending on the package, it'll allow you to add sites you can submit (from what I gathered).
I use it too, and I like it. Have also used the article submitter, but it's a wee bit more involved. Works though.
I believe in manual submission..but I use it for its other features like its report of how many sites have your link, how many were successful, how many failed, etc.
I used it some time ago, but I found IMHO a better solution - fast directory submitter from fastdirectorysubmitter.com. It took me about 30 min to learn how to use it and I managed to submit my site to all the directories it contains in the database (1300+) during a day or two. I got my site listed in a half of directories in 3 weeks approximately and I keep getting the emails about the submission approval each day. What I liked best in this tool is that I can have an unlimited number of titles and descriptions for my site. So, the submission to each directory looks unique.