In the live Demo of the Theme, you have accomplished creating some Text two buttons (Buy Now, View Features) in the Revolution Slider.
Can you please tell us, how you have accomplished that ? (i think there is an option to insert a button to revolution slider), however the CSS is different from your site and i like yours best.
Sorry we missed you topic.
For to have your own button style just go to the specific slide setting and paste this html code with your own link and button text<a href='http://yourlink.com' class='call-to-action call-to-action-button'>Buy Now</a> in the text field as shown in this screenshot http://awesomescreenshot.com/09b4mrlm95
Then Go to Appearance -> Theme Options -> Design Options Tab -> Custom CSS paste the following CSS code and Click on save all changes button: