"It's a collection of features, not a durable chair, with a weight rating its own components question."
The '400 LB Weight Capacity' claim is a static load rating. The chair's dynamic components, like the Class 3 gas cylinder, are not designed for the daily stress of a user at that weight, making the number a marketing target rather than an engineering guarantee.
This is an option for an average-sized person who wants the maximum number of features like a footrest and deep recline for the absolute minimum price. View it as a temporary, disposable furniture item where the pocket spring seat may offer better initial comfort than foam-only competitors.
Anyone genuinely near the 400 lb weight limit should skip this for safety and durability reasons. Users needing proper, adjustable ergonomics for long work sessions will find the pillow supports and lack of armrest adjustment inadequate. If you plan to keep a chair for more than two years, the inevitable peeling of the PU leather makes this a poor investment.