Pros
Disqus is definitely the most enjoyable work environment I've ever had the pleasure of being in. My peers are intelligent and respectful. The exec team has a clear vision. Everyone is encouraged to advance their knowledge, interests, and careers.
When I'm asked what the best thing about working at Disqus is, my answer is always the same. Disqus reaches millions of people every day, and normally for your work to be seen by such a wide audience, you would need to work at a giant company - one where your individual contributions are a very small piece of the whole pie. At Disqus, you get to reach that huge audience, and see your work on websites you visit every day, but at the same time you're not losing the feel of a startup, both socially and in terms of business agility.
The benefits are great. Catered lunch every day, massage, yoga, bike passes, snacks, cold brew coffee on tap, group outings, company outings, unlimited vacation time, medical/dental/vision, bonus, 401k, conference comps....i could literally go on and on.
Cons
Lots of amicable departures in the last year have brought in new hires with fresh ideas, but also the need to make sure that legacy knowledge of Disqus' systems isn't lost.