This is a mediocre chair, not at all worth the price. It was ok to assemble, though there was an extra hole. It slides ok on my smooth floors. Comfort is average, not terrible but nothing great. It squeaks a bit. The worst thing is that the seat compressed and wrinkled after just a week of use. See the attached pics, one when I first assembled it, and the other after two weeks of use. And I weigh 115 lb!!! I don't see owning this long term, it will go off to a landfill sooner rather than later, which kills me. I'm so tired of manufacturers making disposable products.