Pros
The leadership is extremely experienced and have a strong product vision. Additionally, the culture is open and welcoming. Organizationally, the opportunity is in this start-up is very exciting with a multitude of opportunities to wear different hats. More importantly, every role at this stage is extremely important and every person has a chance to add meaningful value to their role and/or the organization as a whole.
Cons
As with any start-up, processes may be lacking or in development, but this is to be expected. If you are not one that thrives in an environment that lacks structure, this organization (at this current time) may not be a good fit for you. Otherwise, I have found that they are much more organized that your traditional start-up who are in the middle of a "Series A" run...