The assembly seems sturdy and well built, and the packaging included everything I needed to install. 
It wouldnt fit exactly where I wanted it due to a pitched roof that we forgot to account for, so I hung it on the side of a beam instead of the ceiling, and ran new wires through. Even with the fitting rotated on its side so the lamps hang at 90 degrees to the fitting, it still looks good (just ignore the wires, I havent tidied them up yet!).