Pros
Opportunity to learn from various aspects of a rapidly growing (and thus changing) growth business. Best education I could have ever invested in. Owners are great people; very progressive. Extremely focused and metric-driven business where slack is noticed very quickly. That being said, the culture retains a lot of autonomy. Also have seen the company invest in education at all levels more so than any of my prior work experiences. All in all, you'd have to dangle a very big carrot to get me to leave under current conditions.
Cons
Early stage startup business that needs to preserve capital, so there is definitely a notable salary discount relative to market for the same level of experience. That being said, similar levels of positions in larger companies wouldn't provide nearly as much latitude. Also, there are a few communication challenges that we struggle through, but not any worse than other work environments I've been in.