I did when I was preparing for the October 2013 eit exam. I found the free videos to be a good value for cost. I also did all the practice problems that were offered. The more practice problems you do, the better. I did find quite a few mistakes which I reported to Justin. I found the practice exam unrealistically hard. I don't even think I finished it.
Overall it was worth my time to work the extra problems.
Looking at the site now, I only see the videos and practice exam. He does have another site, http://www.prepineer.com . I bet that's where the practice problems are now.
Thanks for your thought matt267! So far the free videos have helped me get into a running start at studying. I ran into the prepineer site as well not sure if I will dive into that site, well see.