I've had my MacBook Air for about two weeks now. It's my first ever Mac computer.
Over the years I have owned a number of $1500-$2000+ Windows laptops with specs that were considered crazy at the time. This MBA is hands-down, without question, the BEST laptop I have ever owned by miles. I've never been this happy with a computer purchase. I don't see myself going back to windows for a long, long time if ever.
Dat trackpad, right?
I am also enjoying my MBA a lot. If you need a carrying case for it, this is the one I got, and it's phenomenal. Small, light and still can carry all you need to carry with your laptop (power adapter, cables, external hard drives). It's also low cost but without feeling cheap:
http://www.amazon.com/gp/product/B001TFBPMM/?tag=neogaf0e-20