Pros
The company has a fantastic idea and end goal. Benefits are reasonable. Day to day schedule tends to be flexible in case something comes up in your schedule. Most employees are friendly and easy to get along with, however they tend to be somewhat "clicky". Complimentary dinners on Fridays and the occasional company lunches are always a plus, however there never seems to be enough food for everyone during the lunches. Most people tend to start work late, which could be a plus to some people, but not for others if you are a morning person.
Cons
Management is an absolute mess and needs to improve before they even consider expanding the company or it will be a disaster. Upper management are essentially all physicists trying to run a biotech company, so you can imagine the direction the company is headed. The CEO has a very crude and obnoxious sense of humor, often resulting in awkwardness that is sensed throughout the room. Not enough vacation or sick days. No end of the year bonus. No ESPP. Stock options aren't even beneficial considering the price per share has been dropping for the past year. Supposedly there is a new building that we are to move into which has been delayed for over a year apparently.