For my 16th birthday my parents bought me a 2012 15" non retina MacBook Pro base model. They decided they would wait till Christmas to get me Microsoft office but I just read somewhere that it slows down your computed. Is this true? If it is I would much rather opt for Apple's iWork. Which do you think is better? Does office slow down the Mac? Any help will be appreciated. PS. After surfing the App Store nothing really catches my attention, are there any apps I absolutely need/ should have?