Is this chair actually built for big and tall users?

Yes. The seat is about 26.5 inches wide and the back is high, with a weight capacity above standard office chairs. It is aimed at heavier and taller users who find regular task chairs cramped.

Does it have adjustable lumbar support?

Yes. The lumbar support is adjustable, and the backrest reclines and adjusts. That lets you tune the lower-back fit rather than accept a fixed curve.

How does bonded leather hold up?

Bonded leather is a leather-and-polyurethane blend. It wipes clean and looks like leather, but it can peel or crack over several years of heavy use, more so than top-grain leather.

Will it fit under a standard desk?

Check your desk clearance. The chair is about 39 inches tall at the back and the seat sits high, so a low desk or a tight keyboard tray may not clear the armrests.

What assembly is required?

It ships flat and needs the base, gas lift, seat, back and armrests assembled. Allow about an hour, and a second person helps when lifting the back onto the seat.

Is it good for all-day office work?

For larger users, yes: the wide padded seat and lumbar adjustment support long sessions. If you run hot, note that bonded leather and foam padding trap heat more than mesh.