Pros
I worked at PNAS for a little over two years and gained a lot of positive experiences and learned a ton of useful skills. Beyond the day to day duties of my position, I enjoyed learning about the academic publishing industry and science, in general. I really felt like the work that I was doing had purpose. Management encouraged you to grow by allowing you to try new things and pushed training opportunities. Constantly learning is something that's always going to stick with me. Lastly, I would like to mention that I worked at PNAS during the pandemic, and I believe that management handled it appropriately by always encouraging staff to take off if they felt burnt out or if they needed a mental health day.
Cons
Since PNAS was my first "real" job, I didn't have any other experiences for comparison; however, I would say that the workload was intense and the salary was low compared to the amount of work/responsibilities given, which may not be a PNAS-specific issue but more so a non-profit issue from what I've heard from other folks that work at non-profits.