Product review (4 stars): Complete, INCLUDING the spray arm!
Contrary to other reviews I read, this package DID include the spray arm and it's troublesome rubber gasket.  There were no instructions, but a slip of paper referred to online instructions.  I would give this a five star rating if the rack was identical to my old one, however this rack lacks the "fingers" in the front-center section, where I would normally place my cereal bowls.
The package included:  1) Rack,  2) left and right slide wheel assemblies, 3) Spray arm with gasket and hardware.  It did not include the plastic "stemware" stabilizer, or the brand-name plate at the front.  These were easily transferred from my old rack.
Honestly, I did not need the rack, only the spray arm, which is not even pictured in the amazon listing.  I called them before I ordered, and I was assured that the spray arm would be in the package, and it was!