THE ORIGINAL Balance Ball Office Chair Stool, Adjustable Chair - Ergonomic Exercise yoga Chair that Provides Stability and Core Strength ( SALE - CLICK PROMOTIONS FOR BONUS SEAT COVER RRP 24.99)

So... got my Jellyfish chair, assembled it with no issues whatsoever (it's a very intuitive process), and was off! The first thing I noticed is that it immediately put my back and shoulders into proper alignment, and made me sit up straight. I've played around with the amount of air I put in the seat itself to get to my optimum support profile, and it has become a valued part of my office. Bad habits of slouching and poor posture (along with the resulting sore back) - gone!

When I finally got the Jellyfish Chair away from my children;), I noticed an immediate and immense difference in my workday. As a naturally 'bouncy' and kinesthetic person, even the most ergonomically engineered chairs leave me feeling frustrated - trapped and tired - within their design. The Jellyfish Chair allows me to move WHILE being supported. I can wiggle, wriggle and bounce (or not), and at the end of the day I feel energized rather than sluggish like I do when I've been sitting all day. The material is sturdy and high quality, the design is so simple and easy to assemble, and the height adjustment is seamless. I also ordered the standing desk version for my husband! Well Done! I love it.

Excellent quality, easy assembly, comfortable. Definitely need to purchase a cover because the rubber isn’t the type you’ll want to sit on with any quality clothing.The chair is overall a 5-star product but. I only gave it 4-stars because it slowly loses air and needs to be refilled but it’s a bit hard to pull the plug out. It’s not like you can use anything to dig it out, if you did you’d risk breaking the chain.

Fantastic!! Easy to assemble, packaged well.The chair helps with my posture. I use this at work where I also have a adjustable sit-to-stand desk. When I am not standing, I am sitting on this chair. My lower back pain is greatly minimized.

I previously had a similar chair, it was the entire ball that sat on a mobile frame. It worked fine but I like this better because it is smaller for my work area, fits under my desk, and does the same thing. I sit all day at work and if I slouch my lower/middle back hurts terribly. This chair naturally reminds me to sit up straight and keep my hips and back in line. I will never go back to a normal desk chair again.

Working on my core and posture. I thought it might become second nature but still not first choice for sitting

I just got my chair and once I unwrapped all the components it took less than 5 minutes to assemble and inflate the seat. It seems well made and feels comfortable. I am hopeful it will help me maintain correct posture and lead to a reduction in neck pain.

After two months I can say that this chair is exactly was I was looking for. It has helped me with back pain and has most definitely helped with increasing core muscles. The one and only drawback is that the chair will randomly rise when not in use. Sure it goes back down but it is a pain when stepping away from my desk for two minutes and having to readjust the seat each time. I would still recommend this chair and I glad that I made the purchase.