Pros
Can work virtually from home for many projects
Cons
For the several years I was there, it was a good ole boys' club run by white men who didn't appreciate the talents and hard work of the consulting staff. Senior management had zero management skills. GHG has since been sold and though I don't know what the new owners are like as managers, the mass exodus of dozens of consultants over the past few years isn't a good sign. Also, their client base--at least for the consulting part of the company--has dropped off significantly and they have lost their good reputation. I only hear negative things about them from former clients now.