if one wants to control the outcome then one has to understand lighting, different film types and how they should be developed as there aren't controls on these camera. Basically your shooting at about 125 F11 if your lucky. So in difficult lighting conditions one needs to think which film and how will i develop it; ie. type, time, ratios. With this information one can be more predicatable about the results.
Frankly i modified mine as i wanted the rebate to show on the images , that is a creative decisions.