I got this product to help with writing letters to a blind family member. I used for many years a 4-line hand-braille guide and it was ok, but you had to move it every so many lines and get it lined up correctly each time. I'm sighted, so have never really learned to feel braille rather, I read it like it was a coded message. Mistakes creep in no matter how careful you are. With this product, you insert the whole sheet of brailling paper (about 8.5x11") and start writing. It's great to not have stop in the middle a sentence, move the guide, do a few more lines, STOP, move the guide, over and over. Highly recommended product!