Pros
You get to work with top talent in the industry Good name on your resume Great technology and tools to help you get your job done Total transparency in seeking solutions to technical problems The most senior people are incredibly gracious and wonderful to be around Fun company outing once a year An opportunity to work on ground-breaking projects Very social and fun team with many philanthropic interests
Cons
If you are a rockstar at your current company here you will just be one of the crowd Definitely an inside track for a very select few - don't move for potential career enhancement it is unlikely to happen Kiss goodbye to attending any outside training or conferences People are people wherever; just hope you don't get stuck on a project with one of the jaw-droppingly lazy, sloppy, inefficient consultants who claim "this just isn't' my best fit on a project" and you have to clean up behind them There is a creeping culture of keeping secrets on projects so you could end up taking the fall when you really just needed to be able to ask for help If you are happy with your current job keep it - you will find life very up and down here One mistake and your name and reputation is mud