I had bought a Stillman and Birn Beta Series journal that I took with me to Paris, but ended up not using. So today I finally did. I can now see why a lot of artist love this paper. The paper is heavy, 180lbs and takes watercolor beautifully. No buckling and I can paint on the back side with no problem. I used my Isabey 3/0 mop brush to paint and I was amazed how durable the paper was. I plan to buy other sizes, that's how much I like the journal!!!