Pros
If you get the right manager (sadly, I think all the good ones have left) you could potentially learn a lot about sales and marketing in a fast paced, data driven environment. On the engineering side, you have a team that really cares about great design and code, even if they have no idea what the product is being sold for. Caveat - get the right manager. Get a solid answer on who your manager will be (it's often unknown at time of hire) and interview them as solidly as they interview you. If you get that right, you could insulate yourself from the dysfunction above you and really do well.
Cons
This company will either be a glorious success or an abysmal failure at the hands of its CEO. It seriously could go either way. He's a very smart guy, but is impetuous to say the least. His skills at manipulation rival those at the highest levels of government, but his decision making (often driven by the last book he read suggested by a VC's twitter feed) is seriously lacking, especially in the areas of product and personnel. The amount of churn at this company is also a major drawback. In the last year the company has lost at least the following; eVP of WW Sales, COO/CFO, VP of Biz Dev, VP of Marketing, VP of Product, Dir of Sales, Dir of Marketing, countless engineers and countless sales people. I find it comical that they're listing a new SE position, considering at the end of November they laid off 12 people.
