Pros
Attractive office (both the space and the employees) with an open work environment. Encouragement of collaboration as well as individual initiative (with a very strong emphasis on the latter). Access to a wealth of smart and creative people. Opportunities for travel and direct client engagement. Solid benefits. Overall, a great place to begin a career in the nebulous world of 21st century publishing, as there's a little bit of everything going on (print, digital, mobile, SM, B2B, B2C, etc.) at Imagination.
Cons
Perpetual shuffle of departments, management and employees. Preference for hiring youngsters on the cheap vs. the development & education of existing employees (anyone remember "Imagination University" or the Mentors program?), making even lateral moves within the hierarchy a challenge for the less gregarious. 'New money' is rewarded with champagne and promotions but saving money is barely acknowledged. Frivolous, fast-cash social media campaigns have begun to overtake good content and design as the preferred stock-in-trade. Though a small company, upper management can at times come across as detached, nepotistic and disingenuous. Tendency to overtax and undervalue good developers results in constant turnover in digital department and frustration for everyone else.