Will this work for your basic (padded) office chair?
I am comparing products and while this appears to be the product for me, I am concerned that the cushion will be awkward balancing on top of the already-padded office chairs commonly found in my office / home office, etc.
Does it teeter around at all, or is the support stable? Does it require core strength to keep your posture straight? I'm picturing trying to balance sitting on a phonebook while sitting on a cushion, if that helps for imagery.
I know I definitely need something - I'm constantly subluxated because by the end of the day I am often hunched over literally sitting sideways in my chair!