I remember reading this as a young child, and the only part of it that I remember enjoying was something about a car and a magical journey somewhere. Magical journeys are good, but I can't say the book otherwise made much of an impression on me.
In contrast, CS Lewis's Narnia books had a profound impact on my maturing mind, and I vividly remember the characters, the plots, and the settings. I did feel rather manipulated when I finally realized that Aslan was a thinly veiled Christ figure and, as I was later to learn, much of the book was so much Christian allegory. Similarly , Out of the Silent Planet and Perelandra really made me think, although That Hideous Strength wasn't so much my style and overdid the allegory again.