I learned to read with this book. (I was three years old. It works -- what else can I say?) My sisters learned to read with this series. I've used it with other beginning readers. IT WORKS.
The simple line art drawings are easy to understand. The simplicity keeps your attention focused on the words. The type is a good size for little kids, and the font exactly matches how you print the letters.
After you fill in the blanks, you get to color the pictures, which has the effect of making you review the page again.
(I recommend that you have a set of eight basic crayons for use with the book so that the child can compare the word "green" on the page to the word "green" on the crayon label -- especially for boys, as they have a higher risk of being partly color-blind.)
The usual recommendation is that the child should only do one page or a couple of pages a day, as this is more effective for retaining and applying the principles behind reading.
Placement tip: If the child easily and rapidly completes the first five pages, turn to the middle or the last few pages in the book, and if they can read them, then it's time to move them up to the next book.
It's important to remember that this is designed for LITTLE KIDS -- people for whom the research has demonstrated that printing letters neatly is a significant, multi-step cognitive task.
Adults will find it simplistic and boring. It's not printed in vivid colors. It doesn't have flashing lights. It doesn't make sounds, and you can't click on anything.
But if your goal is READING instead of entertainment, then IT WORKS.
There is a "consonant book" that can precede this one if the student has very little knowledge of letters and the sounds they make.