Pors A comfortable chair and (feels like) a strong tilt action. Easy to assemble, and looks very stylish (true to advert). 
Cons The screw covers dont sit tightly in the holes so fall out. The feetcastor are flimsy plastic, and the arms dont feels strong (also not adjustable, but I knew that from the description).
Overall a nice chair but I would expect better quality for the nearly £90.