Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Can this be used on a living room rug, or does it have to be a bare floor?
Document: Good for beginners, durable, comfortable for bare feet or socks. The adjustable height gives me something to look forward to.
Works just fine for a great price! It's no high end wooden model but it does the job. Rough on bare feet after 10 mins.
Have been using this for 3 weeks now, and it's really helped with my balance. Also helped to strengthen my ankles.This balancing board is much more challenging to use than a bosu ball when you attach the add-on, and use it on a hard floor/surface.
For the money this is great.It really helps balance and strength.We cut a thin piece of plywood in 2' x 2', so we could use it on the hardwood floor without scarring it, while we watch TV.If you don't mind spending more, then get one that has 3 different heights, instead of 2 like this has.
I've used other balance boards, and this one is just as good. The price is much lower and is just as good.
This is a fun and excellent way to improve balance and gain strength in the knees, lower legs, and feet. I weigh approximately 230 lbs and this easily supports my weight. I like to use this while watching tv in my tv room. Easy way to exercise these body parts while having some fun.
This is very similar to the expensive one I used in rehab. My husband is even using it to strengthen his ankles for running.
i used this item as a training device for a puppy that will be doing AGILITY when older... Works extremely well. It is tough and cleans up well. One advantage is the ADD ON HEIGHT adjustment...
I give it five stars. It does what it's supposed to do. The diameter is pretty large, giving you countless ways to arrange your feet on it, even if they are large feet. The angle is such that you will never fall your entire body down in a million years, but you also won't balance without touching an edge to the floor until you've given it considerable practice.There are two difficulty levels provided, but the first is so easy, you'll have mastered it on your first step.
Exactly what I wanted and needed. I used something similar in physical therapy after a bad ankle fracture and 3 surgeries...it's been years since then anf I wish I thought to look for one sooner. EXCELLENT
Answer: yes