I used to have all the diaries in my paperback notebooks. But once I realized that in the nearest years, I would be moving from one country to another and couldn't take all the notes, I decided to buy the iPad mainly because of this fantastic tool. And now it is indeed my favorite note-taking app. And I love all the templates for notebooks (and stickers for notes make my inner child so happy!)
It is a great tool that I use almost every day, there I have my digital notes, my books in pdf, I like that everything is synchronized, I just hope it is 100% compatible with Android and Windows later, because I am an Apple, Windows and Android user, so I would like to have everything on any device I am using.