Let's start with the good: they're fairly solid after assembly. The swivel works well. The blue fabric is lovely.

Unfortunately, they're not comfortable.

The stool is advertised as having a 19.7" wide seat. At the front, it's about 18.75" at best. That in and of itself wouldn't be a problem if not for the side pieces... The side pieces are about 1.5" wide (each), which means the usable portion of the seat is ~15.5" wide at the rear. That means those side pieces dig into your hips and it's not very comfortable. 
It's also only 16" deep, which is less than advertised.