I've had a Asus notebook for a couple years A3J if I remember right (my partner stole it from me :lol: ). It's run flawlessly, so I haven't had to try out the warranty. Places like newegg will let you return it if it shows up doa. But tech support is basically a forum, and answers aren't quick in coming. Essentially, I buy another one, but I also am real comfortable trouble shooting my own rigs.
Another one to keep in mind is that it seems Asus is trying real hard to break into and maintain a strong presence in the notebook market... so my experiences a year ago may not even be issues anymore (support may be a bit more robust). I trust Asus more than say HP, but less than Dell.
They are a good value, come in an attractive package (like remotes, decent carry bag, etc.), but aren't the top performers. I do like them though and would still recommend them.