Pros
In general the tangible benefits Atlassian offers their employees is nothing to sneer at. They may no longer be top of market due to the equity drop but there are few other companies that offer full remote and premium benefits and pay to match.
Cons
Depending on the team you join there are sub-cultures that don't live up to Atlassian values. I was part of a team with incredibly talented engineers that was asked to support another teams code just so that team can do greenfield development and go fast. We're not contractors but it gave the impression our group were 2nd class citizen. The basis of this appears to be based on tribalism formed through referrals or ex-[company] people. This still continues even today after the org has now evolved and things have improved. While I doubt anyone intended this outcome there was an air of condescension from one senior leader that tried to dismiss these concerns.