Pros
Amazing perks, and incredibly passionate coworkers.
Most companies will claim that people are their most important priority, Lifestreet is the only company I've worked at that actually delivers on this. The culture is incredibly friendly, the perks too, and you get a chance to work with the brightest people in the Valley and abroad.
Also every employee has an opportunity to work with the latest technology in the hottest space (mobile/Social Advertising)
Every employee has a chance to work with the latest technology (RTB, Creative optimization).
Cons
The space and technology can be challenging. This is not an industry for the faint hearted.