It was a good read. What I liked most about it, and that you don't often see in 'religious' books, is that he frequently refers to the feedback he got from the radio talks and from sending the text to friends in the clergy to be critiqued before publishing it. Many authors would just read the notes and feedback, and either edit the book accordingly, or ignore them altogether. Lewis handles it in a way that lends to the conversational tone of the book.
As an atheist-turned-christian Lewis has a different perspective than most christian authors, especially with respect to explaining our faith. His goal was to present the barest essentials of christianity in a manner that would be accessible to non-believers, in the hope that their interest would be piqued and that they may become believers themselves. To that end, he relies less on scripture than parable and logic to make his points. It reminds me of Plato's "Dialogs".
While his intended audience was the non-believer, there is much there for christians of any denomination. His approach to the how and why of what we believe gives everyone a lot to think about.
