Warranty replacement went very smoothly. Staples replaced my 3 year old chair with a new one. AWESOME. Warranty claim on Friday Afternoon replacement at my Door Monday afternoon. AWESOME!
It does seem very comfortable but I just got it and cannot vouch for how it will do in months to come. Once thing that doesn't please me is that it's less expensive than what I paid just a week ago I'm very short under 5 feet so the depth of the chair might be an issue for a tall person because it's just fine for me.
I tried all the chairs at Staples where I bought this chair. This one was so comfortable. The Lumbar Support was perfectly placed for my frame. Thin woman about 5'5'' and 130 lbs. I love the mesh seat and back. I recommend this chair. But I also suggest you try them all at the store.