As a start-up I get to be part of so much more than I ever could be in a more established organization. The team is quick moving and able to pivot on a dime also open to new ways of doing things.
Cons
Identical to the Pros - some people prefer a swim lane and a great deal of precedent to work from. Comfort with an entrepreneurial atmosphere is not where everyone can be their best. If the Pros actually sound like Cons to you - this is not a good fit!