I've been an MBA user for 3 years now and I recently started a new job as a Software Engineer. The new work gave me an ultimate 15" retina macbook pro. Wow this thing is amazing! The screen is gorgeous! I am having a hard time switching back to my MBA now after using it. In the end, I decided that it's best to just sell my late 2013 MBA since I will be using the new Macbook Pro for work and home use. Just sharing my excitement .