I got the burgundy one. I received it yesterday. All the materials were inside the package, okay. I am a bit slow with simple instructions and, for good or bad, I watched an assembly video (not the same brand, but just to understand the logic) because it was my first time assembling a chair by myself. I only struggled a bit when I had to screw the back to the bottom of the chair (I had read a review that said to screw the handles to the back first, and it was quite helpful in the instructions), because I didn't have anywhere to lean it against and I struggled while having it upside down on the couch :-)
The plastic parts seem good and durable. In contrast to another review that says the wheels don't roll well, it seems to me that they roll quickly.
I gave it 4 stars because I want to see if it will withstand the test of time.

Negatives for me: a) It has slightly less depth than I expected based on the dimensions given, and what I was used to with my old chair, but I sit well on it, I don't fall off. b) It stays slightly higher (it doesn't have any more room to go down) than where my previous chair, which I had for 17 years, used to go, but my feet touch the floor. I am short, 1.57 meters tall. c) The handles are slightly closer to the seat compared to my old chair, and until I get used to holding them properly before sitting (I am old, 65 years old and overweight), as they slip and the wheels move easily, I'm afraid I might fall down :-)
BUT on the positive side, even though it's not an expensive chair with all the bells and whistles, I already feel better in my lower back and hip, which have been bothering me lately, since I sat on it yesterday. My old chair was quite worn out and falling apart, and it was tiring me a lot.
So, in general, it's probably a good chair considering its low price. I couldn't give more and I was afraid that if I struggled to give more and it turned out to be defective, I would cry for my money. Because I had seen several negative reviews even for much more expensive chairs. And my old chair was about the same price, proportionally to the time I bought it.
It's worth noting that I sit for several hours in the chair, more than 8, because I do crafts. But I make sure to get up regularly and walk, so I don't just rely on having a good chair. That's it.