I bought this chair because my older, bog-standard chair has been causing me back pain and has been long overdue for a replacement. I spotted this in a sale and decided to pick it up after googling around about the brand.
I selected Express delivery (for only £3!) and it did indeed come next day which was brilliant.
The package contained the pieces of the chair in dust proof bags and sharp corners were protected by card to avoid any unwanted damage in the shopping process.
The box included a set of screws and protectors, as well as a suited allen key, as well as a graphic instruction sheet. (All you need to put it together).
If you're going to be putting this up solo, I would say 30 minutes would suffice, but with a hand from another you could probably knock it down to twenty minutes. The back and base were quite heavy and I could see how it would be difficult for a smaller person to put together.
The instructions are pretty much fool proof, including graphics and a number coded inventory.
As for comfort and feel - I have not tried mesh before, and on first impressions it reminded me of how a hammock "fits" your back and assumes the shape of your entire back, from the bottom to your shoulders.
The arms aren't leather or fabric, but plastic so it wont wear down with excessive rubbing - although they seem incredibly sturdy and heavy and allow your arms to fall naturally.
The seat itself is very padded and large enough to cover your entire underside, up to the arches of the knees.
The height of the chair is adjustable so you should be fine with almost all desk heights. Another review on here criticizes that it isn't high enough, but I have an above average height desk and its perfectly fine.
The matte black finish and stylish mesh back means it would fit in almost any home office/work place, and is definitely worth the seventy pounds I paid for it.