There's one other detail worth mentioning, although it could just be my experience.
Several years ago, when the Zen line was introduced, I got one. I've since either personally bought or had close friends get a total of 8 Zen laptops.
My original model, as well as the 3 others purchased in that time frame all still work. In addition, the 2 bought within 2 years of those also still work.
However, both of the laptops purchased in the last two years have broken, one within 9 months of purchase (the earlier purchase), and the other 4 weeks after the purchase (the later purchase, broke before the other failed laptop).
Asus seems to have some pretty serious quality control issues these days.