What is the best way to learn guitar?

Our next door neighbors son has recently started playing the guitar.  It has been fascinating to watch him progress in his skills over the last few months and frankly I have been amazed at how quickly he has been able to play.  I don’t know anything about playing the guitar but our son, Caleb, has been requesting to get one and wants to learn too.  I asked my neighbor how she went about finding the best program for her son and she told me that she started by looking into Learn master guitar review sites and found a great program.  I am hoping if I purchase the same thing for Caleb we will see the same results.