Pros
Digitas has a location easy for most commuters. Very central for getting to different neighborhoods. Benefits are satisfactory. The pay is competitive for the Boston region. If you like a social environment the company certainly gives plenty of opportunities to mingle. Their vacation policies are generous for those that stay long enough to take advantage. The client roster is established and enviable. If you are lucky to work on a great team with proactive, smart managers it can be a wonderful employer.
Cons
The creative side of this office can be stifling and not through any fault of it's own. It's creative for better or worse is Fortune 100 companies whose brands are defined from the general agency partners. Some of the management can be arrogant and divisive. The political climate of the Boston office foremost rewards interpersonal relationships over work ethic. Promotions are hard to come by and long hours are not unexpected. Digitas is a good place to stop in and get your feet wet for a year or two, but don't stay unless you are on a terrific team and it's working for you.