Product review (5 stars): Very simple. Pop! The old one was out ...
Very simple.  Pop!  The old one was out, and then replaced.  Took me 5 minutes to do.  Just be careful to place the spring prongs at the base.  it is helpful to take a picture of the old one and how its housed before you pull the old one out.  May save you some extra time and confusion in the long run.