Pros
The benefits package is solid and includes education, great insurance rates, and retirement planning. Great facilities give you all the tools you need to do your job with pride. This company is respected worldwide and will be recognized on your resume. There are openings in science as well as non-science fields such as marketing. Management is fair and very clear about all policies.
Cons
Location is the biggest issue. If you are not comfortable in (or at least willing to live in) a rural area with harsh winters, you probably shouldn't work here. The biggest city, Bangor, is just over an hour away by car. There are a lot of outdoor activities year-round and Bar Harbor itself is great in the summer, but pretty much everything shuts down in the winter. The second con I would list is that your experience here will vary based on your department or lab group. You should talk to the people in the department you're interested in before making a final decision. In research, we put in a lot more than a standard 40-hour week, even though that's what we're salaried for. Pretty much every other department has a much more regular and less-demanding schedule.