I purchased a lightly used Steelcase Gesture a few months ago. I had been using an Ikea Markus. It relieved all pain and discomfort I was feeling. I should have made the purchase sooner.
That's interesting. I don't have that issue. The height locks but the depth and width adjustments do not. I find that the force required to adjust the depth or width is sufficient enough that adjustments aren't made erroneously like you experience. In fact, I like that the width and depth don't lock. I adjust my armrests throughout the day depending on my seating position. I believe this was the purpose of not making them lock.
Maybe my model year is different or I use my chair differently.
Ok, this is not a problem with the Gesture alone, but i'd really rather have some way to lock the armrests into position after adjusting them.