Somehow it’s not so straight forward to install Unity into a Kubuntu installation.

For Ubuntu 16.04, there’s a bug report describing the package conflicts: https://bugs.launchpad.net/ubuntu/+source/account-plugins/+bug/1574045.

These notes should create a working Unity setup.

# dpkg -r unity-scope-gdrive kaccounts-providers kde-config-telepathy-accounts kde-telepathy-minimal kde-telepathy korganizer libaccount-plugin-google unity-control-center-signon
# dpkg -P unity-scope-gdrive kaccounts-providers kde-config-telepathy-accounts kde-telepathy-minimal kde-telepathy korganizer libaccount-plugin-google unity-control-center-signon
# apt-get install ubuntu-desktop unity compizconfig-settings-manager indicator-applet-complete unity-tweak-tool python-appindicator

Edit 20170410:
In Ubuntu 14.04, there’s no selection to open the terminal in the mouse right click menu.
You need to create $HOME/.xsessionrc in your home directory with these contents:

/usr/bin/gnome-terminal &

Login to Ubuntu (=Unity) session.

Run these commands to start up compizconfig-settings-manager (ccsm):

$ /usr/bin/compiz --replace &
$ /usr/bin/dconf reset -f /org/compiz/
$ ccsm

Enable the Ubuntu Unity Plugin in Desktop category.
It will show some plugin conflicts which you need to resolve manually (= enable).

Create /home/username/bin/unity_start_script.

#!/bin/bash

if [ "${DESKTOP_SESSION}" = "/usr/share/xsessions/ubuntu" ]
then
        /usr/bin/compiz --replace &
        /usr/bin/setsid unity &
        nohup /usr/lib/x86_64-linux-gnu/unity/unity-panel-service >/dev/null 2>/dev/null &
fi

Click the dash icon and start “Startup Applications”.
Click Add and add a new startup application:

Name: unity_start_script
Command: /home/username/bin/unity_start_script
Comment: unity_start_script

Re-login to your Ubuntu session.

Test Unity functionality:

$ /usr/lib/nux/unity_support_test -p

To disable the ibus keyboard layout switcher:

http://askubuntu.com/questions/243639/ctrlspace-has-been-bound-to-invoke-some-input-method-and-does-not-work-in-ema/243653#243653

In 14.04, you can edit the settings directly is dconf-editor.

If it is not installed:

sudo apt install dconf-editor

Then browse to Desktop >> ibus >> general >> hotkey. The trigger and triggers setting will still show 'control+space'. 
Edit these settings out, being careful to leave empty brackets [] in triggers.
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