I was naturally amazed by what the product did to my seating posture within an hour. And it was also then that I realized that I needed an even better chair to use the Curble with.
But I do have second thoughts on its longevity so I will try ordering the models that are built to withstand plus-sized bottoms.
I'm 5'4", 83kgs and I was not quite happy with the Comfy. It lacked the support and stiffness that the Grand had. I had my younger brother try it (5'3", 60kg) and he wasn't quite satisifed with the Comfy.
In the future, I might purchase another Grand or try the wider.
Keeps me sitting straight
It helps me to sit properly. My usual back pain after a long day in front of the computer is gone.