From my experience,

1. Asus A53SV laptop
Luckily this company laptop provided 2 years warranty. where ngam ngam keyboard is spoilt.
Sent to Asus Service Center at Lowyat Plaza.
Take around 1 week to fix

2. Asus MemoPad
The power button unable to start the device.
Sent to same place,
Take 2 week also. (they need to order part from Taiwan that why take very long period)
Both device have problem during year 2013.
For this year, not yet any device have fail me. (touch wood)

Properly as mention by some other forumer, If the device spoil on those expensive part such as screen, motherboard or etc. More likely it take alot time for they to service.