I also have a MacBook pro, just ordered an air.
Hopefully I'll love it
I went through 2 15" MBP's and finally settled on the MBA in late 2010 and just sold it to get the '12 MBA.
I have a MacBook Pro. I abandoned it for the MacBook Air Never touched it since I First touched this wonderful, gorgeous machine.
For something so thin, I couldn't believe it has the performance of a pro computer.
However... I think it's a bit thick. It could certainly use some millimeters off it. Oh, what the heck, I also said the iPod touch is thick. My standards are just high.
Aaaahhh!! Pain in the rear this is, I love this MBA, but I also love my MBP.
I hate it when things don't go to plan!
I have both series and find that other than the obvious size, purpose, and performance differences, there's no difference in quality. They are very good laptops. Period.