Hi Diane,
To be honest, I wouldn't expect much SEO benefit out of this site.
The type of articles submitted give the impression of a low-quality article directory. The other red flag is they seem to accept just about anyone with very little editorial oversight. In the past, evidence suggests that Google tends to not place much value on links from sites like this.
If you're looking to attract traffic, I'd spend a considerable amount of effort to ensure you're creating high quality, relevant value on your site, and then sharing/engaging by perusing a more specific audience, as opposed to a general article directory.
For example, you could use Followerwonk to find influencers in your specific niche, and try to get your content in front of them.
If you're looking for ideas/inspiration, here's a good place to start: http://www.seomoz.org/blog/category/content-and-blogging
Best of luck with your SEO!