Did Asus tested it if its durable?
The support for regular desktop keyboard are breaking and it happened to our keyboard before.
What more if it's in laptop?
Take note, you will be resting your hands on keyboard itself for most time as this is the most touched area of laptop.
Will it be able sustain the pressure from the weight of users hands?
Take note, when typing you are using the keyboard with your hands which means your pushing it with your fingers. Pressing keys from lifted keyboard without support undwrneath, hmmmm
Is it comfortable to use hanging keyboard?
The one from Duo 15 is fine since you are mostly sliding your fingers on it instead of pressing it down.