I agree with the negative AND positive reviews. This isn't going to be for everyone. At the same time, it's possible to get something out of it if you're willing to accept the video's shortcomings.
Overall, I'm glad I got it. I can use it in conjunction with my fitness regimen.
I'd read the reviews before I bought, so there were no surprises - I could enjoy it for what it's worth: a good change of pace, very 'dancer-ly'. It reminds me of portions of the dance classes I took in high school / college, so maybe that helped me. The concept of "accessory muscle" training makes a lot of sense, and I can incorporate that into the rest of my fitness.
After doing the workout three times in nine days, I'd actually noticed some toning. It's a much more fluid form of movement and exercise (than, say, step aerobics or kickboxing), and therefore helps my poise and core. As a disclaimer, I hadn't done much training in a couple months, so probably MANY kinds of resistance training would show results.
I mostly appreciate all of the arm sections (REALLY works my shoulders). Unique, fun moves. I also find great value in the unique horizontal ab moves.
As many have said, there is VERY minimal instruction, and that can be frustrating and laughable. Much of the time, you can figure it out - but it will require you to really look closely and really connect with your body. If you want a lot of guidance, just pass on this video.
For me, lack of instruction is especially a problem on the leg work, because there seem to be more variables in form - (feet pointed? knee in or out? how to align leg? back twisted?). You really have to go through trial and error to see what details work best.
With Ms. Anderson's lack of skill as a group instructor (perhaps she's fabulous when you are gwyneth and doing one-on-one training ;P ), there should have at LEAST been more close-ups, video angles, or even text guidance. For something that's being marketed as "high end" you'd think they could have made more of an effort. Also, as another reviewer mentioned, DVD chapters would have been great when you want to mix it up.
Also... girl shoulda worn her hair pulled back! Sometimes it's hard to consider her form when it looks like she's shrugging her shoulders throughout with all that hair.
I always work out with a Polar heart rate monitor. It was nice to find that I burn around 300 calories from doing this hour long workout. (I'm 31 years old, 5'4", 120 pounds, in good shape). So in addition to toning, you'll get a little cardio and calorie burn.
The 3 pound weights used in this video's sequences are challenging. However, it irks me that Tracy Anderson claims women should NEVER lift more than 3 pounds. I think that "bulking" is a myth depending on how well you balance your training. Ms. Anderson should better define what she means by bulking - it's irresponsible to lead women to believe they'll look like Arnold if they lift light dumbbells (5-12 lbs) !