I read some negative comments from others, but I cannot provide such. To me cons were not significant for interns who wanted to learn and get their hours fulfilled. My supervisor was always happy to help with anything I needed. Perhaps pay may need to be in tune with current market needs, but I did not care at the beginning for that .
Advice: New interns should interview 2-3 principals before settling on supervisor...that way they can choose someone who will attend their needs.