This weighs more than twenty pounds and need a weight lifter to put up on a sloped cathedral ceiling.  Each arm is individually wired and all the bare wires have to be gathered up.  Wires are odd colors and labeled on the bottom, not the top where you need it.  Awkward to try and hold it up while installing the bits.  Put the light bulb in last not before the crystal.  Glad I hired a pro for the installation.  Takes two, really.