These chairs are amazingly comfortable. And they look great in my mid century modern home. The assembly is straightforward but can be tedious (but not difficult) to tighten down the screws with the small Allen wrench. You're gonna tighten them 1/4 turn at a time.  I left off a single star as I am still working on tightening the legs the same amount to mitigate a slight wobble when the chair is unoccupied. While sitting in the chair, it is extremely sturdy and doesn't have the wobble.  Overall these are a great buy!

Pros: comfortable, beautiful, sturdy.
Cons: tedious but not difficult assembly.