Pros
Great location and cool, non-traditional office. Fast-thinking, dynamic people. Dog-friendly office (provided they are trained and neutered/spayed). Good quality and effective work is often recognized. Still growing which allows for good advancement opportunities. Cool to be a part of an organization that is "growing up". Most employees are go-getters and it's infectious. Great learning opportunities as long as you're willing to and seek them out.
Cons
Some dogs aren't as well-behaved so be prepared to deal with "accidents" or stolen pens (i.e. must love dogs!). Located in a very traffic dense area and closest freeway is two miles away requiring a trek through Hollywood. Growing pains as a result of organizational inertia are painfully obvious at times (it's improving though!). Some business units are slammed while others appear to be...otherwise. Though strong belief in organizational goals and values by management, the trickle-down is sometimes slow.