No backlit keyboard on latest editions of Macbook air:
https://discussions.apple.com/thread/2677414?start=0&tstart=0
http://www.zdnet.com/blog/apple/the-macbook-airs-biggest-omission-keyboard-backlight/8945
Yeah, I have no idea why Macbook air gets hyped as a "great battery life" laptop:
First ones - http://www.pcworld.com/article/142314/macbook_air_tests_good_looks_poor_battery_life.html
Historically - http://www.anandtech.com/show/4528/the-2011-macbook-air-11-13inch-review/13
And a comparison chart of the late 2010/early 2011 laptops, don't know test conditions but I assume it was an average load test:
As of Sandy Bridge, well - all laptops gained 2 to 3 hours because it integrates CPU and GPU and takes advantage of a smaller technology process. Now looks like the chart above did not even include this one:
http://laptop-computer-planet.com/b...-laptop-offers-over-11-hours-of-battery-life/
Which is almost twice of the newest SB Macbook air. That's with Nvidia's 520M GPU and a SB cpu.
I assume that there are models that can beat this one too.
Now if it comes to the quality it's the hardest to really prove.
The main difference between Apple and Lenovo/Sony if it comes to return rates comes from the fact that Apple releases almost exclusively premium products while Sony and Lenovo range all the way from low end to the highest business class.
I'm fairly sure that a high end Lenovo model is of much better build quality than a Sony model. That was the main reason why Lenovo have bought IBM's laptop facility - they offered hands down the highest quality with their business series.
I can't find a comparison but go ahead and try a high end Lenovo laptop. They are often using magnesium/titanium composites, with very tough frames, waterproof keyboards etc. I am willing to bet that their return rate is much lower too. Heck, I own a IBM laptop made in 2004 and it's almost constantly on without having a single issue, and I often carry it with me, it survived multiple drops from the bike and such. Only the battery life is naturally not as good as it was back then. The IBM T-series were known as the most solid laptops, Lenovo are using the same technology in their business laptops, that's why they look so rough.
I have to give it to you that these Airs are really cheap in America. Here they are over twice as expensive as these Asus or HP models listed there which makes the difference less of an issue considering that Airs have their own selling points too. They are priced on par with the highest end Lenovo/Sony models here which is really ridiculous.