Do you like it? ----
No, i LOVE it!
Is the sacrifice of speed, hard drive space, and memory worth it? ----
As long as you have a desktop computer at home that can do your gaming and store you bizillion GB of music, there is no sacrifice of speed/hdd space.
For the memory, 2gb is pleanty for anything, you can have more, but that wold be for doing tasks that you should do on your home desktop.
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all in all, if you have a nice desktop at home, and actually have a use for a laptop like traveling, or college the MBA is awesome for you.
--- if you dont have a home desktop and have a need for a laptop get a MBP
---if you dont have a home desktop and don't have a need for a laptop get a iMac
---if you do have a desktop, but don't have a use for a laptop keep what you got, or sell it and buy an iMac
---if you do have a desktop, and do have a use for a laptop get the MBA
(I left out the MacBook from this rundown, well because it's plastic
)