"A chair built for a specific budget, not for a specific body or long-term use."
The 'Heavy Duty 330lbs' claim refers to the chair's theoretical maximum static load. For a person of that weight sitting, reclining, and moving daily, the primary components like the gas lift and foam will degrade quickly.
This is a plausible purchase for someone needing a temporary, disposable seating solution for a rarely used desk. If the alternative is no chair at all, this is a chair. Its primary feature is its extremely low price.
Anyone planning to use their chair for more than an hour a day should look elsewhere. Individuals anywhere near the 330lb weight limit will likely experience rapid component failure. A basic used office chair from a reputable brand will offer better longevity and ergonomics for a similar price.