Pros
fast paced, excellent comp/benefits. Paul English is accessible and has a legendary team around him.
Cons
This is a high-energy, high-pressure, assembly line type of operation. Lots of smart engineers in the room - and lots of smart managers. Very hierarchical. Ideas flow downward, and the engineer's role is to fill in the blanks on the calls product managers and designers make. There are already too many cooks in the brew, so be prepared to be heads down and focusing on your code. There are a number of edgy MIT types on the team who are only too happy to tell you you're doing it wrong. Woe betide the developer who goes against the accepted doctrine on tooling, coding style, etc. The way of communicating around issues like this can come off as aggressive. Be prepared to deal with angry, stressed-out people.