This was a work-study position through FAFSA, where I was doing essentially volunteer work. I was paid for this work via direct deposit as financial aid.
The manager is fantastic! Very casual, slightly sarcastic, always a pleasant experience. The staff is mostly work-study students and volunteers.
It is only open for limited hours four days a week, so it's not super flexible, but you are rarely ever working full shifts (like 9-5s), since it's mostly volunteer-type work.
It was a very relaxed environment and there was always something to do. I was never without a task, mostly sorting and shelving books. It was quite cathartic and calm, and the regulars are kind.
Pros
relaxing work, easygoing environment
Cons
mostly volunteer positions, few hours