I read all the reviews before purchasing this product. I was quite surprised about the outcome and felt obligate to write this review to give fellow shoppers a balanced point of view. Maybe the fellows giving the rave reviews have different needs for the device. I bought mine for the relief of long trips (typically 6-hour drive or more). Therefore, the "cigarette lighter" adapter was a strong plus. You may have similar needs if this is intended for a "long sitting down" in the house or a dorm. However, in this case, you have choices of better products (without the car adapter and a little more expensive). Regardless of how cheap this thing is, it will be you thrown-away money, anyway!
Here are reasons why this is not a good product:
1. The "massaging" components likely will not fit most people, especially if you have a large frame. Those components don't look like they can be easily rearranged. I have a small frame (cloth size S), and they are already out of places. For a larger and taller person, the arrangement will be even worse.
2. The massaging elements are just vibrating (NOT knitting). While this may be "just a minus" to many of us, they can be "deal breakers" in this case. They are so noisy (especially when they are on MAX) that I find it is hard to sit around with this kind of distraction, even though I am very easy to be pleased! If you've ever tried to work, study, read, ... while someone is vacuuming around you, this is a similar experience.
3. The padding of this device is poor. This causes problem with the "thigh" massaging components. I can uncomfortably feel the two lumps under my thighs. It likes someone putting something on my car seat! If you turn those vibrating components on, there is some relief (but not much), and this leads to the next major problem.
4. The manufacturer instruction warns that the unit should not be used for more than 20 minutes. Since it doesn't explain why, it's important to stick with this recommendation. Therefore, for a long drive (or a long sitting down session), you have to constantly remember turning them on and off. And while they are off, you are sitting on something quite uncomfortable! It is also strongly recommended that one should pull to the side of the road each time to adjust or operate the device. There are 5 controls total so I feel that it is equally important to follow this recommendation.
I didn't have a good feeling when I tried this out at home, but I decided to try it on a trip anyway. That was a mistake! I could not wait to pull into a rest-stop to remove the device.
If you are thinking about trying this out since you can always return it, then you should consider the shipping charge. This product is sold by "target.com". The regular Targets in my area do not have it. The charge is $7.5 for shipping handling. That is 1/3 of the product price. I've never returned anything bought from Amazon but I will on this one. There is another $7.5 charge on the shipping for the return. I am not sure how they calculate the refund but I will be out between $7.5 or $15 because I was mislead to buy a poor quality product.