Ranked in these QuestionsQuestion Ranking
Pro Great battery life
You can expect 9-10 hours of battery life with regular use
Pro Thin with a tiny foot-print
Thinner than the MacBook Air, but more importantly it fits well within the foot-print of the MacBook Air 11” while having as much usable screen real-estate as the MacBook Air 13” due to bezels and resolution.
Pro OSX is a great developer platform
Stuff is already there (ruby, python, emacs, vi) or free (XTools for C, C++).
Pro Great Keyboard
Each key is individually backlit, keys are bigger than the ones used on a standard chiclet keyboard and due to them having less depth you can end up typing faster on them.
Con Only has a single USB-C port
If you regularly need to use pen-drives, SD cards, or connect to a display, you will need to purchase a dongle ($79 for the official dongle) and carry it around.
Con Low performance
Because it uses an Intel Core M processor, it doesn't need a fan. The MacBook isn’t as powerful as some of its larger but similarly priced competitors.
Con Shallow keyboard
It has a very shallow keyboard that takes getting used to.