These notebooks are legendary. I have been using them for years in architecture classes, drawing classes, and every other dry media course imaginable. Recently, I have started using them to take notes in my engineering courses, and they perform exceptionally. I can start one class at the back of the book and another at the front, and they typically meet in the middle. The thick sheets mean that anything except an exploding pen wont bleed through, and they make my hurried engineering drawings look clean and well thought out. At the price point, they are the most valuable sketchbooks as far as quality goes. Sometimes the wires come a bit loose and can cause some trouble, but only after long use and abuse. Even so, they bend back into place and function fine. I really cannot recommend these enough and I will continue buying them until they stop selling them.