It doesn't happen often, but these chairs exceeded my expectations! I chose them mainly for the look (sleek modern hi-tech grey) and due to ability to change height, but the unexpected bonuses are also that they are super light weight, have an anti-scratch cover at the bottom to prevent damaging your flooring. The material is pleasant to touch, easy to clean, and it even has an anti-cigarette protective coating (I don't even smoke, but it's still pretty cool :) 

Very happy that I got two pairs of these!