It's been just over a month since I first unboxed my MacBook Air. I wrote a review for InfoWorld that garnered some attention, and a sidebar that far too many people seemed to think was the actual review -- a statement on their own preconceived notions and lack of reading comprehension more than anything else, perhaps.
In any event, I've subjected my MacBook Air to daily use, dropped it once, had it sat upon by a careless individual not once, but twice, and have travelled with it via plane, train, and automobile. I've used it for email, Web browsing, and Linux, Windows, and FreeBSD server administration. I've written thousands of lines of code and thousands of words on it. I've used it on a plane, on a desk, in a chair -- and I still dig my Air.
I've used it on WiFi hotspots, with 802.11b, g, and n networks. I've used it with my Nokia N95 acting as a Bluetooth modem. I've plugged into a wired Ethernet network using the USB adapter. I've done photo editing and some audio processing with the Air, watched movies and listened to music. I've used it with a USB serial adaptor to configure Cisco switches. I've done everything that I normally do on any computer, laptop or not, except use CDs or DVDs -- I haven't needed that function even once. I only used the Remote CD function to install XCode from the Leopard CD the first day. I used Apple's Migration Assistant to move over all my settings, email, and applications from my MacBook Pro (running Tiger at the time) and haven't had any issues with those apps either, except for having to reinstall Microsoft Office.
As with any piece of technology, your mileage may vary, but the miles I've put on my MacBook Air have been straight and true so far. I've only rebooted it once in that month, after installing some drivers, yet I use it every day. That's the key to usability for me. I loathe waiting for laptops or workstations to boot or dealing with OS issues. I have work to do. Open it up, log in, and launch another xterm, all within five seconds.
To be honest, I've grown somewhat disillusioned with the attention it receives in public settings. I can't take it to a coffee shop without at least two or three people interrupting me to talk about it. But if that's the biggest problem I have with the Air, I'm in good shape.