Product review (4 stars): The instructions aren't really useful. You have to be a pretty good contortionist ...
It takes a little while to install.  The instructions aren't really useful.  You have to be a pretty good contortionist to put the bolts in.  I figured out that if I taped the two washers together and placed them on the bolt, then it was much easier to put the nut on.  I also taped a plastic shield on the inside of the fan (temporarily) in order to catch the nuts and washers in case they fell down.
It came in great condition and looks fantastic!