Yet another opinion from somone who hasn't actually used the product, (sorry.) But keep in mind that the long-term goal is to get your child to love books and literature. Sooner or later your child *will* learn to read - but will he/she develop a passion for reading?
You don't need a fancy kit for that.
There are also many people who have written extensively on this subject who caution about over-emphasizing teaching a young child to read instead of using that time to cultivate a love of books. I've been reading Jim Trelease's "The Read Aloud Handbook" and Mem Fox's "Reading Magic" and they both believe that it's MUCH more important to find GOOD books that you and your child can BOTH enjoy together. The main point is to get the kids interested in the stories, hooked on literature. Esme Raji Codell, the author of "How to Get Your Child to Love Reading" has a similar philosophy, and a great website, www.planetesme.com.
Make visits to libraries and bookstores a habit, find when they are doing a special story time with the kids.
Pay special attention to the award-winning books. Find a non-fiction picture book on something your kid is nuts about. (My son likes some of those "100 Things You should know About ..." books. He's got one on sharks and on the human body.) Oh, and don't forget the good doctor, Dr. Seuss. Find a comfy chair, get your kid to sit on your lap (it doesn't hurt to add a cup of hot chocolate or a fruit smoothie to the equation), and try "Green Eggs and Ham" - it only has 50 words! (The same words over and over.) Do the old "magic finger" trick where you point as you go. Maybe give your child one word that he/she is responsible for saying when you get to it. ("OK, your word is 'Sam' - whenever we get to 'Sam' you say it.")
There are lots of ways to learn to read, and some kids learn early and some learn late. And that's fine - in many countries the children are not taught to learn until age 7, and they have some of the highest literacy rates in the world. (It's an Icelandic and Scandinavian thing.) And anything with photos of space, rockets, planets, etc.
Some kids will pick up the act of reading easily, and for some it will require more effort and will really be a chore. But "learning to read" usually isn't the fun part, so get them to love, love, LOVE books BEFORE teaching them to read. They'll be much more willing to go through the chore of learning to read if they have a shelf full of beautiful books that they want to read on their own.