It doesn't look like all that much:
But having done just an abbreviated version — 5 minutes in each of the first three levels, on both legs — wow. I could already feel it working on my lower and upper back, and I'm optimistic about how it'll be able to help with my tight hip flexors.
Of course, it's an hour minimum to do a full session (5 minutes per six levels times two legs), so I think I'll be using this as an opportunity to catch up on Open Air archive podcasts and maybe check out some of the electronic audiobooks from the library.
Yay.