I started going to the Y and had my orientation for ActivTrax a little over a week ago. I've done the strength training twice this week, went to my first Zumba class and incorporated 2 days of walking as well. I didn't know where to start so the ActivTrax system has helped me with a sense of direction and when I accomplish the check-list I feel great about it. The instructors where I go are very helpful, if I have a question about using the machines they are right there beside me. I don't think it's really for weight-loss as much as it is for "toning". When I'm using certain machines I can really feel my back muscles, shoulders, core (especially abdominal) working. I started out doing 5-10 minutes cardio on the treadmill at my own pace, stretching really well, completing the check-list, 15-20 more minutes of cardio and then stretching again afterwards. My ActivTrax logs have been running at around 45 minutes each time. Weight-loss is important of course, but I've come to realize that the toning and defining of your underlying muscles is an important asset too!
Hope this helps!