Pros
Data Coders get a good look at marketing research data, and the position might be a good launching point for new grads interested in an MR career but who haven't gone through a Research Analyst post-grad program. You'll get a lot of experience coding open-ends for a wide variety of studies, along with survey QA and translation (if you speak French).
My colleagues were pretty nice people - mostly a young, easy-going group. The senior management was forward-thinking and really helpful.
Cons
Micromanaging supervisor, really unpredictable hours (basically on-call). There didn't seem to be any sort of advancement path out of the coder position at Research House, even for people with a relevant educational background. The culture is a bit tricky - people in the ops room weren't really seen as market research professionals, but had a different set of responsibilities from phone room staff.