Gaiam Custom Fit Balance Ball Chair

I have had this for two weeks and purchased to help correct alleviate back pain from pregnancy-related posture changes (the farther along I get, the more I was slouching forward). It has certainly helped with that tremendously. I haven't had any issues with the ball deflating thus far. That being said, the frame itself is less sturdy than I expected, and the wheel locks engage far too easily. I have to unlock wheels throughout the day as this happens. I wish it took a bit more than the slightest tap to lock the wheels, and that the frame was more solid.