Solid boxing, it has some good weight which is of course never a bad thing when it comes to any type of stands. Instruction manual is close to nonexistent, but it does not have too many parts and it's easy to figure out what goes where, so it's not a big issue.
One thing that sort of stood out for me is I could tighten the stem/body to the bottom piece without actually screwing it fully on, which gave me some freedom of rotating the upper piece but at the same time it wasn't straight and I'd assume if left like that it might tend to bend. I had to fully tighten it and move the whole piece around if I had to. Again, not a biggie unless you're cemented to your chair or constantly moving around. I'm using a pair of these for holding up studio monitors for mixing so I'm fine with this.
It wiggles a little bit when pushed (with weight on top of it) but other than that it doesn't budge at all. I'm not using the bottom spike screws only the rubber feet, I'd guess those could give me some additional stability but I'd rather not scratch the floor up with those. As the manual is 4 drawings in total I wasn't sure what to make of those.
In the end, this is my first ever monitor stands and I'm wasn't at all disappointed, I think I got good value for my money. Can totally recommend!