AbCoaster

1. It Gets The Job Done Completely And Efficiently: I don't think there's a lot of debate that hanging leg raises are the gold standard of an ab or core workout. The only problem is that this sequence of movements or exercises requires you to support your own weight while working your abdominals. Not many people can do this, much less do it correctly, Even for those folks with a strong upper body who can, it's hard to do more than a few reps. The ab coaster allows you the same range of motion so that you're working the same muscles, but you're not having to support your own weight. Therefore, you're able to do many more reps correctly. Obviously, this is much more effective.
And, you don't just feel the work out in your core of midsection. I feel it all the way under my arms (upper obliques) to well below my hips. It is my experience that you can get the job done in less time with the machine.
2. The Machine Is Sturdy, High Quality, And Adjustable: This is not a chintzy or cheap machine like you might find at a discount store. The ab coaster is made out of high quality steel that is heavy and sturdy. The literature that came with it said it could support up to 300 pounds and I absolutely believe this. But, although it can support larger folks, it works nicely for smaller people too, as the seat is completely adjustable.

3. The Results Are Pretty Quick: When I was researching this machine in weight loss forums, I did not believe a lot of the results that people claimed (and I still think some of them may have been exaggerated), but I now know that the results come pretty quickly if you stick with it. Obviously, you have to actually get on the machine regularly to get results. But, if you make even half an effort, I do now believe you'll achieve your goals pretty efficiently. It is also my experience that the machine works all of the muscles in a way that is much superior to crunches and sit ups.