There were some issues with earlier Ubuntu/Linux/BIOS versions, but most have disappeared with new releases. The last one is a palm detection issue with the touchpad, but it should to be fixed in 16.04. And if you can't wait, at least you can fix things yourself if you want.
I'm not sure if I could fix palm detection. I am certain that I could spend a lot of time trying to fix it and for me, that time would probably be better spent elsewhere.
The original one was definitely working though.
(Apart from that and the HiDPI, the latter of which is the DE devs' fault, the laptop is awesome.)
Wow, that's very good. I've always found running a VW absolutely destroys battery life.
For laptops, I've only ever managed to get 9+ hours on a Macbook and that's pretty much the threshold that I'm comfortable with to leave with a laptop as my work machine for the day. If you're getting 7+ on your Asus running a VM, you have to be over 9 without the VM running, right?
I'm going to load 16.04 on my ThinkPad and see how it does.
This is with core-M, so in many ways the things to watch out for are screen brightness and anything which makes the processors ramp over 800mhz - that actually seems more damaging than processes that just wake a lot
BTW, my VM was running Windows and that's probably why it drained my batter so quickly.