Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: round base (black) that i see is rigid? or is flexible and can fold?
Document: The package I received looked fine. I was delivered on time. However the item looked as if it had been returned. There were sneaker tread marks on the blue ball part as well as dirt and a couple of long black hairs. Also there was a deep scratch on the black base part and some weird indentations on the blue ball. I contacted Amazon and they over-nighted me another one.
I used the BOSU at physical therapy, and loved it. So I decided to buy one for my own use here at home, even though they're not cheap. I had had it for less than a month and had used it only a handful of times, and it fell apart! The blue inflatable part came out of it's black plastic housing, and it looks like I'll have to take the base apart in order to reset the blue part inside it before I'll be able to re-inflate it.
No problems so far, works great. I can see lots of potential exercises to supplement my workouts. Looking forward to it
Very disappointing. It was only used twice by a 130 pound woman and then while it was not in use - just laying on the floor by couch- it separated from the base. It was returned for a full refund.
Great bosu ball- it came with a pump. I use this at home when I cannot get to the gym. It provides a more stable base for ab work than a regular exercise ball. Would highly recommend.
Haven't used it yet for any standing work as my broken ankle isn't ready for that yet, but I can see it helping with that, too. But for now we love using it for crunches several times a week. Works great. Durable. Well built. Yes it's expensive...but if it does what I need for it to do...it's all good.
My balance exercise stop short after 4 days of using this. I made a mistake of thinking it is a minor problem and tried to put the ball back into the black rim by deflating it and putting it back in. Few more times happen and I spent a week skiing and now it happens again. Try to return it but the return date has expired 3 days ago on Feb 17.
The rubber dome ball on the Home version is made with 2 lbs less rubber than the Pro version  and the box on the home version only says BOSU it does not say Pro nor does it say Home. Also the black part of the  Pro version is lined with rubber to prevent slipping and it does not have feet. The thickness of the home version is definitely adequate to prevent it from busting as long as you stay within the weight limits as described.
I've used these as a Personal Trainer at various fitness clubs over the years and loved them. I purchased one for home use from Target but could never get it to properly inflate or hold air. Called the customer service number at BOSU.com website last week to see if I was missing a step somehow. The gentleman who took my call said they occasionally get a defective one and it sounds like I managed to have gotten one. He said they'd ship one to my home to replace it.
very goodkeeps the family hoppin keeps the blood runnin keeps the muscles in shape makes the children giggle,very intertanin.
Answer: no