Pros
Meet new people; get experience with working in stressful situations, experience with cash register, experience with customer service.
Kontras
Some background on my experience with KFC: I worked part-time (my hours were anywhere from 15-25/week) there for 9 months, was 18 when I worked there. --"Training wage" (for my first three months of employment I was payed $7.85/hr, less than my state's legal minimum wage of $8.25/hr. Was not worth being paid below minimum wage just to "get work experience.") --Management tolerates sexual harassment (my store's general manager was creepy as hell around me. He physically invaded my privacy, gave unwarranted compliments, asked creepy questions ("What part of your body do you like the most?"). I said something to the other manager who then admitted that the creepy GM had been written up for sexual harassment multiple times in the past. He was never demoted or anything, just written up. To add to his creepiness, he (who was 30) had met his wife (who was 18 at the time) while she worked at KFC as a crew member. He flattered/bribed/rewarded her by giving her more hours than other crew members, which lasted until the other workers realized what was going on and reported it. I never filed a complaint out of worry over him seeking revenge or telling my future employers that I was a bad worker. He also had my personal information, cell number, etc.