I am new here (and to mystery shopping), and I did a few of these last month. It really was easy. No narrative, just a handful of yes/no questions. They don't care if you are candid about the pictures. They took about 10-15 minutes to complete, from entering the drive through to submitting the final report. One of the approved burgers is pretty cheap, you can get a value fry and water to keep the cost down, but its still not really worth it until they start increasing the fee a bit. Of course, I'm new to this so I'm still figuring out what is really "worth" my time. And I definitely won't go out of my way for this, but I have several of these restaurants nearby, so I'd probably do these shops again.