Pros
extremely well qualified colleagues who are excellent at mentoring and sharing knowledge. Brand recognition and business partnerships have a way of getting the company in the door, and people respect that. Hitachi Consulting has done extremely well in the BI arena and establised a name for itself. They adopt a local market approach, so the consultants don't have to travel as much (or at all in some cases), or you can be a part of the National team and be involved in some great, high-exposure engagements.
Cons
some baggage from previous acquisitions and the consulting environment. Compensation does not follow the same pattern as the IT market, which it turn makes consulting job salaries slightly lower than average IT jobs. Also, with consulting, you're expected to be an expert at the client site, and you may end up working longer hours at times.