Pros
PCA is a very transparent company especially how the interviewing process is conducted. There is a first interview which is one on one. You are shown samples of actual current promotions and the entire process of how traffic flow and exposure is explained at length including diagrams to make the concept easier to understand.
If selected for a second interview, you are invited back for a job shadow day to see exactly what a typical day consist of to again provide 100% transparency. This all happens before any candidate is offered employment. This is all in hopes that the company figures out your strengths, weaknesses and to see if you are trainable. Of course you will know by the end of the day if this type of promotional work is for you or not.
This process is crucial because if hired, the company will invest substantial resources training you to succeed.
Cons
There are absolutely none that I can think of.