Based on the reviews, I thought these chairs would be too firm. Although they definitely are firm, I would say they are still comfortable for long periods of time. 
Some of the holes didn’t line up exactly when assembling, but pro tip: when attaching the arm/leg piece start in the center, then secure the front, the rear may be misaligned, but it is the easiest to force into the right spot. 
The caps that cover the bolt holes didn’t always fit exactly either. 
I would have given 4 stars, but they were so affordable that those inconveniences are negligible. 
First Wayfair purchase, definitely happy with it.