two stars cause .. .it's ok.  Looks fine.  However, the assembly is really difficult and took a long time.  I am still not sure it won't collapse under me.  I am keeping it, but not optimistic.
Would I buy it again?  Doubtful. 
Would I recommend it to others?  Probably not, unless they are really handy  with this sort of thing.  There are several key places where bolts and washers have to be screwed in but it's almost impossible to get into that tight little space to do it properly.  As a result, I am not confident in the stability of the chair.

I would advise the makers to check out ZINUS -  they provide a great little ratchet wrench to use in assembling their products - exactly what would have been useful in this case. A regular allen wrench just makes it harder. 

All in all, this chair is a disappointment - the first one I've had with All Modern.  (And I have a desk on order... hope it's easier to handle than this!)