40 minutos - 1 hora
My fan was growing louder and louder with time, and the macbook was starting to occasionally shutdown from overheating.
Went well. The guide, especially photos were extremely helpful. Used the small part of a pencap instead of a spudger.
Pay attention to Step 6. Screws definitely can strip very easily. Fortunately for me, they also pry out without too much difficulty.
A set of fine point tweezers is helpful for taking out loosened screws and putting in a safe place.