No need to reinvent the wheel. This is an excellent tutorial for the Repix app. It explains in detail how to use each of the features. This tutorial was created before the update on July 2, 2013 which includes the addition of new live brushes, new frames and an update of the Master Collection which now includes all the brushes, filters, frames and future updates.
Below is another tutorial showing a more painterly editing style with the Sensu Brush. I haven't ordered a Sensu Brush yet. Do you have one? If so, how do you like it?