I just finished putting it together; it probably took me half an hour or so. I like the firmness and support of the chair itself (which I'm sitting in as I type this), a significant improvement over my old office chair.

Works great on my Formula racer chair purchased in 2016 (almost 7 years ago). Also purchased on a Friday morning, delivered on Monday.

Very comfortable chair overall, been using it for the past month now and can say being able to recline is an absolute game changer. One small thing i have to complain about with this chair specifically is that the armrests are a little dense and uncomfortable, but you can move them in multiple directions giving you the best chance of being the most comfortable. Overall i would give this chair a 9/10