Avantages
TL;DR: 100% remote, solid pay / excellent benefits, super nice coworkers, interesting scaled work. Overall, I had a great time working at MoveOn during the 2016 election season and beyond, coming as a former tech/data director at a similar, but smaller organization. It was exciting to work with a talented tech team working on software and data problems at the scale MoveOn does. I personally learned a ton, and do believe the work we're doing has an impact on members' lives. I also got the chance to interface with nearly every staff member on some level, and have to say that I never had any problems with anyone; quite the contrary. As with any workplace, your experience will largely be determined by which department / team you are a member of. I was a member of the relatively new and well-managed tech team, so I can't speak to working as an organizer (though I would argue that working as an organizer anywhere is tough job, and the 100% remote environment could potentially exacerbate the inherent challenges associated with organizing). That said, the remote working style was perfect for me. I was able to travel all around the U.S. (NOTE: you will not be allowed to work outside of the U.S. for 527 org legal compliance reasons!), so long as I was able to attend our daily team meetings and other pre-scheduled cross-team meetings / trainings. These are all conducted via video, which actually works better than you might expect. The rest of the work is conducted largely real-time via Slack, though there is still a significant amount of internal communication via email. My supervisor was very respectful of our time (and differing time-zones), and didn't require any team member to work longer than 8 hours and never on weekends. Of course, the team certainly did come together a few long days/evenings when there were outages, etc. but that's to be expected in any software engineering role.
Inconvénients
As another reviewer pointed out, the average MoveOn staffer might find themselves challenged by the tech/tools employed by the organization. Under the leadership of an awesome CTO, Ann Lewis, and hard work of a talented and lean team of engineers, the org is making serious strides in this area to alleviate these challenges and ensure less time spent by staff on tech headaches and more on impactful work, while also building and maintaining cutting-edge member facing tech. I don't know if this is necessarily a bad thing because there aren't really any junior-level positions, but due to the flat nature of the org chart there aren't clear-cut paths for advancement; I observed new positions are usually hired via external applicants rather than existing staff members (though I did see a few folks get promotions with different titles). Certainly different from other organizations I've worked where hiring is almost 100% internal, however this is a good thing for you, the potential applicant reading this review!