Pros
Great working environment with like-minded teams; frustrations are rare. Weekly catered lunches, free beer on tap, refrigerators stocked with all kinds of drinks, delicious espresso. Team and company-wide events, bi-weekly company updates, quarterly retrospectives, cross-functional projects - this is a team-focused company that encourages everyone to get involved and contribute the best way they can.
Cons
None for me! But consider potential cons, depending on who you are: Being a startup, there isn't a clearly defined career path, so you make one for yourself; if you don't want to take initiative on your own, then maybe wait until the company is bigger. If you are expecting an annual salary adjustment just for showing up to work, you might be disappointed. Things can change very quickly, so if you don't like change, you might not like working at Apprenda.