I bought the dark brown color to go with our kitchen island (dark brown wood). They were easy to assemble - just be sure to read the directions. I like the way the matte black stand (the whole stool, really) kind of disappears next to my island. That was my goal. Matte black doesn't show dirt and is easy to clean. When you sit on them and move back and forth in an exaggerated way, there is a bit of "wobble," but the base stays flat on the floor. They feel safe and quite sturdy for the money, and so far the height adjustment function has worked smoothly. 

When I first assembled them, the seat material smelled quite strongly of mothballs and I was worried. But the smell dissipated after a few weeks. I'm pleased enough with them that I'm about to buy 2 more!

Pros: Easy to assemble, attractive, fairly sturdy, great product for the price
Cons: Seat material smelled like mothballs for a few weeks, slightly wobbly