Positives: I’ve worked 40 hours a week in this chair for over 2.5 years. That’s at least 5,200 hours of sitting in it, plus any time I’ve been at my desk for personal computer work. It’s very comfy! It’s held up well and still going strong.Negatives: The arms got mildly wobbly fast, like within a few weeks. I was worried they’d eventually fall off with how fast they got wobbly, but they’re still attached all this time later (and still just mildly wobbly). Over the last few months, the chair won’t stay raised and goes down to the lowest position on its own within a minute of raising it. The seat has really started cracking over the last month or two so I covered it with a faux leather patch that I found for a few bucks on Amazon, and now it looks close to new again. I considered only giving it 4 stars because of these things, but decided to give it 5 because it held up perfectly while being used full time for over 2 years.I’ve never had a comfier office chair, so I’m not ready to replace it. When that time comes, I will buy this one again.