I first bought this workout as a VHS tape in the mid-90s. I wound up using it so much that the tape completely wore out - I actually managed to record the audio as an MP3 file just before the tape broke down completely. I'm extremely pleased to have the DVD.The aerobics workout is the primary feature - it has a good warmup period and is paced well as an introduction for people who've never done this kind of exercise before. If you're completely new to this stuff, or just getting back into it, you can definitely use this workout to get ramped up pretty quickly from zero to reasonably in shape. The second and third segments are strength-building sections, and they weren't something I could complete all the way through right away, especially the 2nd section (tough workout for the legs, also includes pushups and crunches). After a few weeks (starting from zero) I was able to get the aerobics completely mastered, and could do the entire workout all the way through; later I added weights. If you stick with it, eventually you will likely graduate to a tougher workout, but this would still be nice for an "easy" day.Even though it's pretty active, you do not need a whole lot of space to do the workout. You need kind of an L-shape of cleared space, where you can easily step 3 paces forward and 3 spaces sideways, with the area forward being a little wider (you need about enough width in the forward-to-backward space to essentially do jumping jacks). I've been able to do it in hotel rooms on the road.I've enjoyed it, and kept coming back to it nearly 15 years later. When I used it consistently (and watched my calories) I lost over 20 pounds, and that's after adding quite a bit of muscle. I'm back at it again this summer, and getting through the whole thing today brought a nice sense of accomplishment.There are a few minor flaws in the aerobics - one or two places where she gets slightly distracted and does an extra few reps of one move, and one where she goes one rep short on another. Editing could have fixed this. After a while, though, I actually found myself using these as a way to remind myself how far into the workout I was; they're not too big a deal.