People have to realize, Asus has been a "Excecutive" class laptop company for years. They manufacture lots of very high end laptops. They cost more, but on average, are very well put together, with great features, and have some of the best warranties out there.
One of their great strengths is also a weakness, they innovate a lot. They will often fly through designs and models several times a year. One model gets a lot of attention a few months out, they might have discontinued it for a new one.
90% of the people out there never heard of Asus laptops till the eee exploded on the scene. Before Asus created the netbook market, everyone was fumbling around with mini PCs, so underpowered, awkward, hard to use, low battery life. Asus just played by the KISS rule, Keep It Simple Stupid.
I own an Asus laptop and am very happy with it. I also work with a lot of laptop hardware repairs and see a lot of the problems laptops get. even with a far smaller market share, I still don't mind going with Asus for my next purchase. But I'll never buy a used laptop.