I always get this brand. I love the ruler to follow & measure. Very easy to do. Just don't be in a hurry & pay attention. I barely tap on till I see it is on the correct line. If by chance you make a mistake it might be possible to gently undo. I got away with a few of those boo boos. I use a pencil & make a faint line then line up the tab clear part to the pencil line & tab line to the page edge. It helps to have your page held up clear of the book. Some of the commits had videos attached, made it easy to see how to put on the tabs.