In a word, this lamp is spectacular.  Nicely packaged and arrived quickly.

Others have stressed the importance of adjusting the cable lengths BEFORE mounting; I agree and for my purposes (mounting in a stairwell/entryway) I found a 4" difference in lengths gave a really pleasing effect (i.e., 12, 16, 20, 24 and 28 inches).  

The globes are heavy.  Because I had no help with installation, I bundled the globes/wires together in a canvas shopping bag which I could attach to the top of my extension ladder.  This left me with both hands free to mount the lightweight canopy to the mounting bracket.  It's fiddly but straightforward work if you take your time. 

The lights are BRIGHT.  I recommend a dimmer switch (make sure you get one made for LED lights).  Apart from being beautiful and well-built, the design has one terrific advantage over many other lamps for a stairwell/entryway application; they will be a breeze to keep clean (with a feather duster).  FIVE STARS.