I'm a huge fan of pretty much anything paper related as I make all lists, plans etc the old-fashioned way - and Knock Knock pretty much has the market cornered to a T. Not only do their product cater to whatever function, interest or humorous penchant you might have, the paper is also excellent quality - not flimsy like other I've bought. I own probably about a dozen different variations of this particular type of product (meaning the size) - ranging from the basic to do list to packing view decision-making etc. I also have post-it versions and smaller lists. To date, none of these Knock Knock notepads have ever let me down and as a product I would rate them a solid 5/5 without hesitation.