Pros
The lean organization gives many opportunities to do things way above your pay grade. This is also a big con.
Cons
Everyone has 10 more things added to their normal job responsibilites so everyone is burnt out. Marketing runs the show and no one (including HR) dare stand up to them. This creates a "Mad Men" type culture of management judging you for what time you show up each morning and what time you leave each night. They are trying to change the culture but no one will believe it as long as the actions don't match the words - this includes promoting people who are jerks and not really understanding whats going on in the lower levels. If you join, steer clear of Marketing and see it as a temporary move until you can find something better.