I went on a sketchbook binge recently. I bought four sketchbooks. Each is different with different qualities from one another. One is spiral-bound with kraft colored paper; another is hardbound with multi-media paper; another has watercolor paper and the last one is flexi with more drawing paper. I am particular about the pens I use and the sketchbooks I work in. And if you were curious… it takes me about 3 months to go through one…. roughly.