Ana Reinert of The Well-Appointed Desk does an extensive comparison of three of Moleskine's notebooks.

First and foremost, Moleskine notebooks are available in a multitude of sizes, configurations and form factors. The overall aesthetics are streamlined and understated. While you might not love them, its hard to truly dislike them. If anything, they are plain. And they are ubiquitous. You can buy them almost anywhere: the airport, the bookstore, the coffeeshop or your favorite boutique.

— Reconsidering Moleskine by The Well-Appointed Desk

Notebook and writing fans will love this.