It actually is not complicated at all. The spin is not super fast...90rpms. The breathing is timed to the rhythm...not super slow, but rhythmic.
The music and voice over are very relaxing...much more wonderful than Coach Troy from Spinervals. And, along with the breathing and the spinning, there are prompts about stretching a variety of small muscles that are easy to forget while riding...things that get tense, but that we can actually stretch on the bike.
It is a paradox...working hard and keeping a decent spin, and breathing from the diaphragm...while also practicing relaxation techniques.
I read an article by Ian Jackson, the guy who made these, about once when he had just finished some kind of endurance event...either an Ironman or maybe one of those double IMs. Anyhow, someone (a reporter? I can't remember) asked him how come he looked so refreshed or peaceful or something at the end, and he said he had just completed XXX number of miles or hours of breathing meditation.
Anyhow, it is interesting. I haven't done it for awhile, but I need to get back. I noticed a better spin, much better breathing, lower HR at the same power, and much more mindfulness and peacefulness during the ride. The CD is something like 90 minutes, and it goes by quickly.
"The best rides are the ones where you bite off much more than you can chew, and live through it." ~ Doug Bradbury