This! but YMMV, here's my journey so far...

Using Ubuntu on a 2016 MBP Retina 15"

1. First 14.x: mostly functional, trackpad was buggy. Brightness wont work. No Bluetooth. Blame on kernel 3.x

2. Then 15.x: almost functional! mostly everything worked great wth kernel 4.x, but no bluetooth nor camera. That's ok, I can live without that

3. Now 16.10: almost perfect. Bluetooth works again. Still no camera, but I have trust it will soonish :)

Also the machine never shutdown nor suspend correctly. I need to restart the machine, press ESC, write "exit" at grub, and then pick "poweroff" form the UEFI menu.

But even with all this drawbacks, I don't regret and full recommend to try this setup. This is the best hardware/software combo. And even the battery last more than 12 hours with linux!

16.04?

yes! ..but edit window is closed

¯\_(ツ)_/¯

How does the trackpad feel? How's the battery life?

Trackpad is great, battery life probably a bit less than os x, Im using a mid 2012 and get 3 hours, want to upgrade to the next model with the 9-12 hour life.

Em...that's just half of what OS X can do. I have the same model, but my laptop can last at least 7hours in a coffee shop.

This is the 11" mid 2012, 13" has larger battery -- I was lucky to get 4 hours with os x when I first bought the machine, the battery is now 4 years old and gives me 2:30-3 hours under latest Ubuntu.