Installation was a little difficult.  Instructions were a little unclear.  The first step is to hook the bracket to a 2x4 in the ceiling.  In our situation we were just replacing an old light so we could not access boards in the ceiling, just the junction box.  Now installed we are having a horrible scraping sound when the fan goes to stop.  One of the blades is hitting the metal base.  Disappointing.  It looks nice and produces a nice air flow.