I decided to change my MacBook Air 11 inch (year 2010 model) for a brand new MacBook Pro 15 inch Retina display.
Why that big jump from 11 inch to 15? Actually the time that I bought my MBA I was travelling often because of work. I was always carrying my work laptop and my personal one, so I wanted something as light as possible. Later on, iPad came and (I own now an iPad Air), and it became my travelling device. Besides that, my work profile has changed and I do not need to travel much, so a 15 inch Retina screen is great for home as my primary computer. And I was so tired so seeing pixels on my computer :)
Possibly a short review might come shortly.