Only 1 star because 20 cheaper in store and I had wanted to buy another. Yes, it was difficult to assemble the chair back even with the instructions to put on the box in which it came. Laying on side worked or have another person for a few seconds to line up holes. Otherwise very ergonomic and comfortable chair if in the 5ft5in range.
Awesome chair for the price. Very comfortable, not oversized, and fairly easy to assemble. Very satisfied with the purchase. For these reasons, we bought a second one for our office.