Pros
It's a treat to work with so many brilliant minds and inidividual persnalities. I don't get a sense of everyone drinking the corporate "kool aid" (except the recruiters). The innovations in technology we get to use and see put into action with our numerous customers is another good reason to come to work. Also, everyone here understands that we are all only human afterall and cannot be treated like some machine that just pumps out the work 24/7. They really do promote a healthy work/life balance.
Cons
As a young-ish company, there have been some bad habits upper management and the execs have fallen into. In my department, our "leader" has never gone to bat for us and he has been this way long before I ever started (9 months ago). There has been a tendancy to let the finance department and the CFO pretty much run the company and if you are not in their favors then you are out of luck.