The DVD set is decent. SEOmoz is one of the biggest brands in SEO and they know what they are doing. The DVDs are worth the money if you are an SEO newbee, if you have already tested your strategies than you are better off joining "more advanced" seo forums (which are free). I personally watched the entire series and it only confirmed that some of the "advanced" seo techniques we use are effective. If you have been optimizing and following the trends for the last years you won't need the DVDs, if you haven't or are still submitting your URLs to the search engines than it is a great place to start. BTW there is a new updated set coming out soon so if you are thinking of purchasing it wait some weeks.