I bought this incorrectly thinking it was the squared version that has pages that are like engineering paper.  When I got it I realized it was just blank pages and then realized it was my fault for failing to read the description/title correctly.  I have since gotten the squared version (professional series though) and absolutely love it.  I use it to take daily notes and draw up diagrams/charts/tables etc.  I am an engineer and have found it is perfect for the types of things I do.