I searched many websites to locate a tall, thin, narrow shelving unit that was able to fit in a specific area of my apartment.  Wayfair is the only business that had exactly what I was looking for and at a reasonable price....the unit was easy to assemble, is stackable and can be added to.
It arrived well-packaged and in a timely manner.  I am extremely satisfied - thank you.

Pros: see above
Cons: none