The theme is very reliant on slider plugins and the assumption you understand how the 3rd party plugins operate. Installing demo content is one thing but then looking at documentation it states to use WP customisation feature which isnt suitable as demo content are all bespoke pages. Example to change the logo you have to go into each individual slide / page utilised and change rather than simply adding your logo like a basic WP theme. Im sure its great , just not practical to keep editing individual pages for global customisation etc.