Lugging that executive chair up the stairs nearly killed me (plus I figure it was only luck that the stairway walls are still intact) which is why it's not coming back down. Like TimC, I wouldn't pay that much for a chair, I just clicked the button in the mothership procurement system.
I apparently have an Ikea Långfjäll. I will need a few more drinks before I can pronounce that. It doesn't have all the knobs and levers of the other chair (you can spend weeks adjusting that), just up and down, but I'm perfectly happy with it. It's fairly small, so if you have hippo dimensions, probably not the chair for you. Otherwise, I find it very comfortable and I can spin around and rock back and forth in all the proper ways that a certified Product Leader needs.