Anime, Manga, Japan Cultural Tour

I ran across this link(s) while looking for cheap air fair to Japan, just passing it on:

http://www.popjapantravel.com/

http://www.popjapantravel.com/summer06.html

After debating it for a while, I have decided that I am interested in going on this trip in September. Has anyone gone on one of these Pop Japan Travel trips? I am wondering if anybody can tell me if these tours are worth the money...