I purchased 8 of these chairs for my first office and I'm very pleased with them... so much so that I bought 14 more for my second office. Takes less than 10 minutes to assemble including breaking down the box and the chair has been very durable and easy to clean (especially important during C-19).
My Kelburne desk chair went together easily and is very comfortable. Am very happy with the chair so far. I’ve only had the chair for a week so I can’t comment on it’s adequacy over time. I am fairly tall and the height adjustment lever allows me more than enough leg room.