Pros
I worked full-time at the Observer for several years. There were many pros and opportunities, but not anymore.
Cons
Employees are treated terribly, and no one there is happy. The emphasis on quality reporting and unique takes has been replaced with aggregation, post quotas and contributors using the site as their personal conspiracy theory platform. The people in charge have ZERO journalism experience (literally, the interim EIC hasn't worked as a reporter/editor for a single minute of her life). And they're not interested in informing themselves either. Every day, editorial policies are changed for no rhyme or reason, simply because management doesn't have a clue and is scrambling. Readership is tanking. And then there's the Trump/Kushner connection, which certainly does affect your ability to get interviews, etc.