Pros
If you want a meager ($9/hr) salary that you need to pay $250 to become certified in lifeguarding and CPR and First Aid, and you want to be called at 11:00pm on a Friday night to be persecuted by the office, have shift changes and location changes at the absolute last minute this job is for you.
Cons
The management treats the employees like dirt, and the patrons at the pools will take pictures of you on the job doing literally nothing wrong or incriminating with out consent, send it to all their friends, and the picture will end up in the hands of management, who will fire you over misrepresentation of an image captured by patron who have nothing better to do than complain and spy on people doing their job.