Pros
I started this job at 21 years old, and it was the perfect job to fulfill my desires at the time. It was very exciting to not know where I would be going next and it was fun to explore and travel. Pay started of well for me (as a young person living with family) and you are guaranteed at least 70-75 hours a month whether you work that many hours or not. Opportunities to pick up shifts, swap, and work overtime were good as well. As you build seniority, you have the ability to build a very good and flexible schedule that allows you to have a work/life balance. The best benefits of course are the free standby travel and buddy passes.
Kontras
Most things, if not all, are based on seniority which is hard to accrue unless the company is hiring and sending new flight attendants to your current base. Therefore, I was on call a lot, getting called at 3 in the morning, working very inconsistent schedules. Some weeks I wouldn't get called, some weeks I would get called everyday. Additionally, the aviation industry as a whole is very unreliable. Therefore, you may think you are going to be working a 6 hour day but with delays and cancellations, it could very well turn into a 12+ hour day.