As its not designed for Ubuntu and elementary OS, I have to overcome some limitation
Notification is Passive
If you send pair request from your phone, a notification will nicely appear in your top right side. But how do you accept it, clicking will make it disappear? (You can't even click on Ubuntu).Remote Touchpad doesnt work
Ubuntu 14.04 default repository is shipped with KDE Connect 0.5 while for touchpad you will need KDE Connect 0.7.1 which you can get from backport repository or you can download from. Keyboard also not yet working, because you need to have 0.7.3 version of KDE Connect.
So for now, the only way to pair your device is from desktop and accept it in your phone. In the future elementary's notification will support action button too, so you can accept it from desktop.
- update: I've upload KDE Connect 0.7.3, Ubuntu and elementaryOS user should now have all features