I really enjoyed reading MacArthur's "One Perfect Life", which is a harmonisation of the gospels, and gave it 5 stars. Even though "One Faithful Life" is the same principle, I can't recommend spending money on it.
Why not? It is basically the letters of Paul in Chronological order, and the book of Acts serves as the "starting point", and then the letters are placed in the correct place in Acts. While it is absolutely nothing wrong with it, I find that you can preferably buy the MacArthur Study Bible, since this book is directly from the MacArthur Study Bible, and read instead. If you are interested in when the letters were written, you can easily find out.
I don't give it 3 stars for the content, since the Bible is always 5 stars, I just don't think it is worth spending your money on this book.