Specs:

- Here are the specs of the machines: Retina 15: 2.3GHz Quad Core Ivy Bridge Core i7, 16GB 1600Mhz DDR3 RAM, NVIDIA GeForce GT 650M with 1GB of GDDR5 memory, 251GB SSD, 122.47GB free, OS X 10.8.2; Retina 13: 2.9GHz Dual Core Ivy Bridge Core i7, 8 GB 1600 MHz DDR3, Intel HD Graphics 4000 768 MB, OS X 10.8.2; MacBook Air 11: 2GHz Dual Core Ivy Bridge Core i7, 8GB 1600MHz DDR3 RAM, Intel HD Graphics 4000 512MB, OS X 10.8.2; Mac Pro: (Early 2008) 2x 2.8GHz Quad Core Intel Xeon, 34GB 667MHz DDR2 RAM, ATI Radeon HD 2600 XT 256MB, OS X 10.7.4

- Battery life (60 percent brightness, 20 Chrome tabs, half of which self-refresh, last one is a 100-hour Nyancat YouTube video) was 3 hours 15 minutes, which is a good number compared to 13-inch ultrabooks.

- Sound from the laptop's speakers was pretty good and fuller than what you'll get from a small laptop.

- If you've never used a MacBook before, the chiclet keyboard is extremely comfortable to type on (and remains slightly different form the Air keyboard, despite the smaller imprint), and the trackpad is still the best on any laptop.