I love Kali Ray! This is only my second DVD with her as the instructor. This DVD emphasized moves that bend, twist and stretch the spine. You will also get some ab, arms and leg work with it.
The quality of the production is great. You do not have to turn your head awkardly to watch the screen as all of the moves are slow, repetitive and well instructed. If you miss it the first time, it does come around again.
I know that some reviewers complain that this is slow, but I think that is the point. It is very meditative and stress free. You will feel better after doing this 60 minute work out as opposed to more stressed.
This DVD does require some upper body (cat bow, sort of a modified push up) and lower body (half locust, leg lifts that work the gluteal area) strength, but Kali offers modifications and suggestions if the pose or flow is too difficult for you.
I own over 80 yoga DVD's and this series is fast becoming my second favorite (Ana Brett and Ravi Singh being my first).

I needed something to help me build sufficient strength to do chaturanga (low push-up) for ashtanga yoga. This DVD was invaluable. After doing it once a week (and practicing the spinal wave off an on in between formal practice) for about 2 months, I am now able to EASILY move from plank to chaturanga! Not only can I easily lower into chaturanga, I can also hold this asana for one complete breath before going into a full cobra! Please note...I am a 60 year old woman with moderately severe pulmonary fibrosis!

I rented this at my library & only skimmed a few minutes of it. If there was any music, it was very low/light, she seemed nice, but if you're looking for a workout, even for a beginner, look elsewhere.
This video is purely to open up your spine with about 5-8 poses (child, cat, supine spinal twists, etc.) taught slowly & held for a a min or so. I'm sure they work, which is why I left on 3 stars since this is geared to rehabilitation & yoga can always help with that.
I wouldn't review this considering, but just to warn anyone expecting a moderate paced workout to save their money.