Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: if you have bought this trainer and used it   would you buy it again knowing what you do now?
Document: Being a big dude (6ft/300lbs) with bad knees, ankles and back, I often avoid exercise. But, after having the courage to buy this recumbent elliptical trainer, I am impressed. It was a piece of cake to put together and not very difficult to move around. I rode this bike for 20 minutes with no pain or discomfort, unlike my stand-up Health Rider I own. I will be selling that old Health Rider as soon as I can.
Firstly, Amazon's service was terrific. The first one that came, didn't have the hardware. Amazon immediately replaced it and absorbed the cost of the return and second shipping.I am thrilled with the machine. I bought it because I have arthritis in the knees and the physical therapist said not to buy a bike.I use it a few times a week and really feel a difference in my knees. I like that it does not have to plug in anywhere, so you can situate it anywhere that is convenient.
If you are just a beginner, this would be a great trainer for you. I find it to be just so so, I don't feel as if I am getting a great workout. Someone with injuries for recouping, this is the ticket.
The Schwinn  520 was a great buy.It was easy to assemble and I would recommend it to anyone.I had total knee replacement in both knees and the 520 help me get my kneesback in great condition.
After having by-pass surgery and going through rehab, I needed something for home use. Treadmills are too boring so I decided on  this machine since it's very close to the machine I used in rehab! I would suggest getting some help to put together (someone who's mechanically inclined) as it could be quite a job for someone with little stamina and like me, little patience. I like this machine even more as it has a spot for my Kindle so I can read as I exercise or watch TV.
It simply doesn't fulfill the reasons why I bought it.
I purchased this trainer in March. After two months the flywheel started knocking on the undercarriage and has only gotten worse. I have been unable to find any support to correct the problem. I am getting rid of the trainer and getting something better.
works well; quiet; very easy to assemble; good quality; comfortable; Priced competively; The seat is hard to adjust but not a big deal; I recommend buy
I received the Elliptical Trainer just a few days after ordering it and am most satisfied with my purchase. It was not difficult to assemble, although it did take some time. I am very happy with it - these are difficult to find and the price was definitely right! The only thing I don't care for (and my roommate does not have this complaint) is the back of the seat leans too far back for me; but I just put a small cushion behind me and problem solved.
This machine is for those who need an easy workout. I use it to get my heart rate up every day. It does the job it is intended. My wife has back issues and knee issues and this is the only machine she can use. Do not buy if you are looking for an intense workout.
Answer: yes