Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Does this chair actually massage (shiatsu/rolling) or does it just vibrate?
Document: That said, she also complains that most traditional massage chairs are too forceful and are more likely to break her bones. This chair is a lot weaker than the usual shiatsu chairs. It can vibrate pretty intensely but as the vibration is not pressing into your back and is instead covered by a lot of plush, it's much weaker.Take this portion of the review with a grain of salt as the chair is only a day old. So far it's quite comfortable. The material is comfortable, if cheap.
When I think of a massage chair, I think of nice rolling MASSAGING balls moving up and down etc. I did NOT want a chair that only vibrates. I have owned  the vibrating chair matts that you put in an existing chair and they are wonderful ! they roll and move up and down, pushing on different parts of your back. They are also called massagers and they do not, however, just vibrate. This chair vibrates so loud you cant sit in it and watch TV or anything.
The chair is nice and comfortable but that where it ends. The massage part is a joke, like another reviewer wrote all it does is vibrate and almost induced vomiting because I became dizzy and nauseas after about 2 minutes. Not sure If I'm keeping it or not but the truth is what did I expect from a $200.00 chair.....
Great chair. I wanted something that would vibrate and be under $300 and this was it. Some people said the quailty was not here but it looks really nice. I liked it so much that I bought two of them.
This chair is absolutely worthless. There must be someone who works for the company writing these reviews because they are BS. The chair sucks. Do not buy. All it does it vibrate, it will NOT help your back in ANY way. What a waste of money..
The vibrating functions is ok for me. I don't tend to use it a lot unless I've hurt my back or am really sore. The problem I have is it tends to vibrate my head which I do not like at all. 7/10 for the vibration. One of my only problems with the chair is the foot rest power cord. It gets in my way when I have it plugged in so I tend to leave it unplugged always.
They resemble ikea directions except in this chair, all the parts are guaranteed to fit together correctly, unlike my sister's ikea desk (the drawers jut out terribly as the holes didn't line up). The only issue I had with understanding was the step involving wiring. As the wiring itself is fairly obvious, this was not a large issue. (If the leg portion doesn't vibrate, try plugging it in elsewhere).I bought this chair for my aging grandma.
I bought this chair in order to facilitate the relaxation I normally achieve through whiskey--it works. It took about an hour of set up, but nothing too complicated even for me. Now, put together, it's fantastic. It looks a couple of hundred dollars more expensive than it actually is, and the combination of vibration and heat make it a trap I can sink into for several hours.
chair is wired wrong and the legs and thigh  massage part is backwards....Other than that the chair works great
This chair is a great value, it doesn't look cheap in person by any means and the heat and massage feels wonderful
Answer: Vibrates