You will need a mouse or stylus to use it.
No root required!

This app is NOT full Ubuntu OS – it is a compatibility layer, which allows you to run Ubuntu applications.
Your phone is NOT rooted during installation.
This is NOT official Ubuntu.com release.

No OpenGL support. No audio support. You cannot burn CD-Roms etc.

You will need 180 Mb free on internal data storage (or 200 Mb for office suite), plus 320 Mb on SD card.

It cannot mess up your Android device. It is a plain regular Android a