Love the 8 x 10 size. Always looking for a size slightly smaller than letter size. Love the narrow ruling. Perfect for my type of handwriting. Love the thread binding. The book lays flat at any open page. I tested the following pens: (1) Pilot Metropolitan fountain pen w/fine nib; (2) TWSBI Mini fountain pen w/fine nib; (3) Stabilo fineliner; (4) Staedtler fineliner; (5) Sakura Pigma Micron fineliner; (6) Sarasa Dry gel pen w/0.5 mm tip; (7) Pentel Energel w/needletip (0.5 mm) and conical tip (0.7 mm); (8) Zebra Mildliner highlighter; (9) Jetstream hybrid ink pen w/1.0 mm tip; (10) Paper Mate felt medium tip pen; (11) Crayola Supertips marker; and (12) Uniball Signo DX w/0.38 mm tip. With the exception of the Energel and Jetstream all produced bleedthrough and enough showthrough to interfere with any written text you may place on the opposite side of the paper. Needless to say the paper is a huge disappointment.