Pros:
Comes with gold content certificate.
Hypo-allergenic "silver" look made from white-gold for those people allergic to silver/steel.
Very interesting box-type chain links.
No metal smell on skin after coming in contact with it.

Cons:
As others have noted, it is very short--> 16" as opposed to 18".  I knew this when I bought it thinking it would be a nice "change" for my wife, but she has difficulty wearing it 24/7 like she does her yellow-gold 18" necklace.

Summary:
Be sure this length will work for the recipient before purchasing.  A very nice and detailed piece that reflects light nicely and uniformly nor does it get gets kinks easily.  Made from mostly gold for those allergic to other metals.