Having decided I must get in shape about a year ago, I like many others started a basic fitness routine that included simple body weight exercises like Push-ups, Pull-ups and Squats. My Push-ups and Squats have progressed great. I've got more endurance, definition, and overall strength from doing those exercises. Pull-ups went nowhere for me though. I started out doing negatives by standing on a stool to get up to the peak position, then slowly lowering myself down. Over time I did get strong enough to do a few of these, but I hit a plateau and had not progressed in several months.I tried a few different things, including doing pull-ups on my wife's Total Gym, tying a dumbbell to my belt with some rope to act as a counter weight, and switching between chin-ups and push-ups randomly. While those methods seemed to help a little, none of them provided a clear path of increased strength. I asked around the fitness forum I belong to and got a couple of responses pointing me to the Jump Stretch bands. I picked mine up from Amazon and it showed up a few days later. No hassle, fast shipping. Awesome.I decided on this one specifically because I wanted just enough assistance to break my plateau. For reference, I am 6'2" and 215 lbs with body fat between 15% and 20%. The first day I got the band, I looped it over and through my bar and did a set. The resistance was just about perfect. Talking with the folks on the fitness forum, I was also advised to start doing pull-ups 4-5 days a week instead of 1-3. Some lifting plans focus on one heavy pulling workout per week. If you already have sufficient strength to tax your muscles, that might work fine. If you work a desk job and have weak pulling strength like I do, you may find more regular work will help you build muscle and endurance.Anyway, once I got the band, I started a new program - 5 consecutive days a week, I do three sets of assisted Chin-ups (palms facing towards me) using the Jump Stretch band. When I started, I could do a total of 6 reps before I broke form and could not complete another full rep. So, my program was 3 sets of 3 reps once per day. The next week, I went up to 3 sets of 4 reps, and so on. Now a month later, I'm up to 3 sets of 6 and I can do several unassisted Chin-ups with proper form. I'm going to keep this going until I can do 3 x 12, then start over with assisted Pull-ups (palms facing away from me). I will repeat the pattern until I can do 3 x 12 on the Pull-ups. At that point, I can start over yet again without any assistance from the band. If I'm still having trouble, I may pick up one of the smaller bands, but I doubt I will need it.I've tried all the popular versions of the assisted pull-up/chin-up and this one seems to be the golden ticket for me. I'm a big guy and I've never worried at all that the band will snap during loading. This thing is solid as a rock and it shipped quickly. It does exactly what I needed it to do. If you're looking to increase your pull-ups, I can't recommend it enough.