Monobooth comes with testimonials post type integrated.

Creating testimonials:

In order to create a new testimonial it is necessary to go to Testimonials in the dashboard menu. In the image below you can see all the fields available for a testimonial post:

Also for each testimonial it is possible to assign categories: 

Using testimonials:

The testimonials can be displayed using a shortcode in form of a slider.  When editing any page in visual editor mode, you’ll notice a icon that can be used to generate the shortcode:

When clicking on that icon a shortcode generator will appear in a popup window. You’ll have the option to select the categories and the number testimonials you want to have:

The generated shortcode will look like this:

[flo_testimonials categories='categ-1,categ-2' nr_posts='8']

The end result will be a slider with testimonials likehere: http://demo.flothemes.com/crowd1/testimonials/