I used every single page in this lab notebook over the course of 3 semesters of Chemistry lab. TERRIFIC lab notebook. I love the spiraled notebook compared to the bound kind. It is easier to flip and you can lay it flat to write in. This is also a great, great price. I bought the bound kind for $40 in my campus bookstore and this was $10. You won't find a better deal. The carbon copy also works great. I had to turn in the carbon copy after each lab for 1.5 years and never had any problems. Would highly recommend if you need a lab notebook that carbon copies (this is when you write on a page and it makes a copy onto the next page so you can keep a copy and tear out the other copy to turn in to your professor). If you don't need this, don't buy this...just get a regular notebook.