First, this ball is "true" green, not the color in the photo. Second, there is a terrible "rubber/plastic" smell that gave me a headache when I first opened the package. Only after a couple days in the garage to air-out did the smell dissipate. I shutter to think what the workers that made this product are exposed to. Third, the pump is a joke. Plan to use a bicycle pump. Lastly, the product is what it says it is: an exercise ball. But it is heavy weight which is good and the puncture resistance is needed if you get into advanced workouts or you have dogs/cats that think this big ball is a toy :). When you first receive this ball you should unpack it and let it "age" in your garage for a few days before using it.
Product DescriptionAnti-burst ball is made of a new material that is stronger than ever, holding up to 2000 lbs. The burst resistant material allows the ball to slowly deflate if punctured, minimizing the chance of injury. Specifically target your abs, back and glutes. Strengthen and tone your entire body by working your muscles in a completely new way by giving constant resistance from every direction. Great for people of all ages, and all fitness levels. Comes with a pump and an exercise guide. Size: 22" (55cm) for individuals 5'1" to 5'7". Ball color: Pear Green
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J Fit 55cm Professional Grade Exercise Ball (Pearl Green)
after waiting for a month or so I got an e-mail from the seller Joe Muscle stating "Unfortunately we are unable to process and ship your order at this time. We have cancelled the order and voided all credit card charges (you will not be charged)." I ended up getting a better price, and of course my yoga strap at a local sporting good store.
I needed a door anchor for my exercise bands. This filled the bill. It's sturdy and easily stored (small and light). Great product.
While the quality of these bands seems decent enough, they are only 4ft long, which is shorter than I wanted. It would have been nice if Amazon would have listed the dimensions of the bands.
to say this is the flimsiest item i've ever received is an understatement...i would return it, but it would cost more than the product is worth...maybe i'll use it as a planter, or something else - it won't stay together, and when i did assemble it, the ball would roll like crazy...really surprised amazon would sell something this bad, 
I bought this to use on my desk chair to improve my posture and make working at my desk less sedentary.Because you have to subtly but constantly work at maintaining your position your muscles will definitely feel it until you get used to it.All in all I'm very happy with it and it was worth the price just for the laughs the first time I sat on it!