Pros
Some of the greatest minds in the Colorado web software development community hang their hat at this organization. I have seldom had the privilege to work with better people under better leadership. The interplay between co-workers sometimes borders on being a harassment lawsuit waiting to happen, but in many respects that's part of the team's charm, and one of the reasons I loved coming to work every day. I'd say my former associates were almost a bit like family, although some of them I kind of hope never show up at reunions. A lot will be demanded of you by the best of the company, and if you so desire to work for it, you better be ready to be proven wrong, and act like an adult when your ideas are on the line.
Cons
Sometimes the teams can be a bit immature and grossly unprofessional (as stated in pros, this is also part of the charm). The benefits here, however, are just terrible. There is somewhat of a looming fear of the sustainability of the business with frequent hiring freezes and a general lack of consideration to the quality of work spaces (e.g. they don't supply chairs, and many desks are broken).