The education is pretty good if you get a professor that knows what they are teaching. If you keep within the majors that Eastern is great at, you're guaranteed for a good education. As for living on campus, you will end up making a few great friends, but almost everyone leaves on the weekend. Most parties that you'll end up going to happen off campus so make sure you make friends that don't live in housing. Eastern will probably loose your digital documents some way or another when it comes to financial aid or housing so don't count on it. Don't be afraid to join clubs that sound geeky, you might end up making some crazy friends. If you're an upperclassman don't get the dining hall food plan, they are over priced and the food at Hurley Hall is disgusting.
As part of the Connecticut State University system, ECSU offers an excellent value to Connecticut residents. While large enough to offer a variety of programs and courses, it is small enough to make it easy to schedule the courses you want with the professors with whom you want to study and get to know both the professors and your fellow students. Likewise, while ECSU doesn't have the prestige of a large research university, even in introductory level classes your contact will be with the professors rather than teaching assistants. If you want to get the most out of ECSU, you'll need to proactive: take advantage of the approachability of the faculty to evaluate courses before registering and carefully plan your coursework to maximize your preparation for graduate school or employment.