I have to say I find Louis Solomon the best teacher I have come across in yoga/pilates. I have all 7 of her dvd,s and you can do just one 15-30 min workout or carry on to do up to three with most of them. Her voice is wonderfully soothing and I find once you have watched the dvd once you can continue with the workouts by just listening to her instructions. They are precise and structured and continual, you will not loose your way but can always take a peak if you are not sure of the position! She also instructs you continually when to breathe / inhale and exhale, this is Very Important in yoga and so many instructors do not tell you which breath to take with which movement. I have many dvds and can honestly say that in 7 years of doing yoga and pilates she is the best instructor,which is why I have all her dvds, secondly if you like just yoga , Ursuls Karvens power yoga runs well along side these dvds to do once a week or more. 10 out of 10 to Louis though.Everyone I have suggested these dvd,s to have loved them as well. Do 15 ,30 mins or more most days and together with a reasonably healthy (after all we all need treats this is 2011!))controlled low fat diet you will see a difference after a couple of months.We all have, especially in our abs!