I have lumbar issues and I'm short. Couldn 't find a chair that was comfortable, adjustable and moved about smoothly and quickly on hardwood floors. Have an L shaped work center. Had tried many different chairs including straight backed ones. We were in Walmart and my son spotted a mn adjustable, smooth rolling chair made exactly like the one in the picture you sent for something like $29.95. He said he'd buy it for me and I kept telling him it was cheap and a waste of $30.00 but he insisted. I LOVE IT! The member who said she leaned forward when she sewed is correct and I think we all do subconsciously...(could it be vision deficits that make us do that?)