"Amazingly fast, incredibly portable"5.0 starson by Rob Pettengill
Pros: Fast Processor
High speed I/O for external disks
Beautiful, strong, lightweight package
Cons: It's not a free upgrade.
11 inch air (although as small as an iPad + keyboard) has a shorter battery life (4-5 hours).
Summary: I gave up my larger Macbook pro for a 2010 Air when I realized that the SSD made more difference to me than a faster processor. Over the past 2 years I found that the 128 GB SSD wasn't large enough for me. Not only does this upgrade give 512GB, and 256KB SSD storage options and the CPU is 3X faster than the 2010 air. The high speed USB 3, and Thunderbolt I/O make it a great desktop replacement when hooked up to a big monitor and disks.