I bought Fitball Seating Disc Balance Cushion because I have always wanted to have nice strong abs but with career and family life, I couldn't find the time to go to the gym or exercise at home.
  I have been using it for one month and this early I am noticing some difference in my core.
  This product is supposed to feel like a stability ball.
  It imitates the design of the ball.
  What makes it better than a stability ball is that is a cushion that you put on your chair.
The good thing about it is that it lets you do your office desk work and strengthen your core at the same time.
  When you look at me while I'm working on my desk and using this cushion, you might think how I can strengthen my abs when all I'm doing is sit.
  Well, if you try it, you will feel the work on your abs once you sit on the balance cushion.
  It's what they call active sitting because you need to balance your weight while you're seated on it.
Another good thing that I noticed is that aside from working out my abs while letting me do my office work, Fitball Seating also helped me improve my posture.
  Since starting to use it, I noticed that I am more upright and more smart-looking.
  When I'm working, I am not conscious about my posture but when I started using it, I need to actively sit upright because of the design of the cushion.