Reviews on Amazon are generally as positive as mine, so I have no reservations about recommending it.
Penny Smiths Essential Guide To Yoga
As with all exercises / health classes. It feels best to vary what your body does. Some Pilates is also beneficial for strengthening the core muscles that support the backbone - but too much creates pressure on the lower spine, compacting the vertebrae.
Yoga improves flexibility, decreases stress and lengthens the spine, especially if you spend ages at a desk, or digging foundations for your house by hand (!). I suspect yoga, pilates and something aerobic makes the perfect combination.
Review (part) from another buyer
I really like to way the video provides ideas for adapting these poses to specific needs and abilities and think that the list of health benefits and cautions is useful. A great video to get you started.