I haven't personally done this workout, but I have read SEVERAL wonderful reviews. Many who do Jillian Michaels also do Hip Hop Abs. I hear it is a great routine which is not only quite effective, but actually fun to perform! I haven't bought it yet, but I am excited to buy it whenever I have the extra money!
Heck yeah it works! lol I have it as well as pretty much every other Beachbody product and I can tell you that as long as you actually commit to doing it you will see results. I am at my goal weight and feel better than I've ever felt because of these programs, that's why I became a coach :) Hit me up if I can answer any questions for you!