Pros
Very, very smart people. The NY local office is packed full of the smartest people in the business. Very entreprenurial. All ideas for growing the business are welcome and the org provoides excellent support when you make a persuasive case for one or another initiative. Local model means that you see your co-workers often and in varied situations. You're not just a body biling hours at a client like other consulting firms do. Many different technologies and business initiatives under way at any given time, shepherded by (always smart) SMEs. Lots of cross-pollinization.
Cons
The only con is related to the local model. It's so aggressivly local that the NY office is relatively isolated from other offices. This is terrific on the one hand, since we have a free hand and control our own destiny. On the other hand, there's a risk that we reinvent wheels which is not efficient. I've only been there 3 months so far, so this "isolation" may well be an impression from an early NY office joiner. I want to be clear that the isolation isn't a hard and fast rule by any means, just a natural consequence I believe of the strong emphasis on a local model.