I bought this chair because I needed to work from home due to covid. Got a great price and it is worth every penny. What I will say is the chair is definitely not great for 8 hours of constant use. That is based on my use and opinion. I also feel the seat base cushion leans forward.
So far so good. However I am a little concerned about the Allens Wrench that you included because the bottom connection might loosen I hope that will not be a problem. I would recommend this product at this point.