Pros
I guess some of the people there are cool. Just not the ones who influence big decisions or company culture or employee wellbeing or good creative. Oh, and they pass out beer every now and then. That's nice. I mean, it's not like it's the best beer, but it does the job, and it's free.
Cons
1. Don't expect to ever advance there. 2. Don't expect any respect. 3. Don't expect any useful creative direction. 4. Don't expect any good clients. 5. Don't expect the support of management. 6. Do expect a stagnant salary. 7. Do expect to see positions with high salaries that do nothing. Ever. 8. Do expect to move to another city when you're ready for a change (which will come soon). 9. Do expect grumbling, cattiness and complaining from employees about the state of things. 10. Do expect to see the people you like leave quickly or be let go.