Hey, everyone! I've seen a lot of people post about this P90X series. I visited the website, but there doesn't seem to be a lot of information about it, other than a brief synopsis of each workout. Do you have to buy the whole set? How long is each workout? It is comparable with Cathe, more difficult, or what? Is it weird working out with a guy instead of Cathe? Thanks for any information you might be able to float my way!