Pros: Cheap, fast, safe, easy.
Cons: I can't think of any.
I've been using the 1100 for over a year now and it beats free weights, hands down. I have done free weights for decades. I maxed out on free weight butterflies at 110 lbs.
With the Total Gym, I have exceeded that. I am 6' 6" and weigh 253 lbs. I have exceeded the weight limits of the machine and it still performs safely and with ease. When I do butterflies, I place two 50 lb free weights on the bench with me. A total combined weight of 353. With the pin at the very top hole on the side, I am calculating at least .43 times the weight. I am butterflying 152 lbs. That is more than I have ever done before. And it is safer than I have ever done before. If it got to be too much, I just put my feet down, instant release.
In addition, the effect on the muscles is better and greater. In the past, with free weights, if I went a week or so without working out, as I have done due to working and being sick at the same time, I would lose a little bit of the edge in lifting heavy weight. With the Total Gym, I hit the same weight as I always did. So, the exercise is providing a longer lasting benefit.
I can do concentration curls with the back of my arm against my rib cage and get a better burn in the bicep. I can do cross cable rowing that actually works the lats.
I can do the Iron Cross and rotate my shoulders at the same time which really blasts my chest. Tricep pulls while laying down by keeping my upper arms against my rib cage. Dips at any weight I want. Leg pulls that tighten up the gluts without straining my back.
And my resting time between sets is way less, as in, less than a minute. 4 sets of 12 reps of butterflies, curls, rowing, Iron Cross, dips, triceps. Leg pulls at mid-height with 50 reps on each leg. In less than 30 minutes.
And I get worked abs just using the machine.
After nearly 3 decades of progressive resistance weight training, the Total Gym is superior to all of that. And you can train any way that your body moves. So, even if you have limited range of motion, you can still work out. You can get a wider range of motion than you can with machines and a wider and safer range motion than with free weights, especially heavy ones. You can train for whatever your favorite activity is. It's at home, warm and dry, you can wear what you want. You can jump in your own shower afterwards. And you only have to buy it one time, basically paying for itself in one month or less. Because you are at home, you are focused.
This thing rocks and I was hooked the first time I used it. I know they say that in the commercial but it's true.