Pros
You get to work with brilliant and innovative engineers. Due to its startup nature, in this company you get to exercise your creativity and problem-solving skills on a day-to-day basis, inspired and motivated by the fact that your work gets to go to space, and your product (remotely-sensed earth imagery) gets to move science and industry forward! You work together as a team for the success of the mission. As long as you believe in the mission, and are a self-starter, you will have a great time here!
Cons
This is not a con for me personally, but I imagine some might miss the predictability and structure of bigger companies. But to me, this is a welcome challenge: no two days are the same, every day brings its own exciting challenges to tackle!