I am an alum and a parent of a recent grad. .
The Ex-College just celebrated its 50th birthday and I would have to say that in both our cases, Ex-College courses stood out.
They run the gamut from pragmatic, career-related courses taught by industry experts and government officials to entertaining, but thought provoking flights of intellectual fantasy. (Think Vampires, Harry Potter and Superheroes.)
http://www.excollege.tufts.edu/news.asp
For me, it was an Ex-College course in Decision Theory, taught by a high ranking military officer using the Cuban Missile Crisis as a case study.
For my daughter, I would say it was the combination of a pragmatic course and an internship for credit through the Ex-College (part of a minor in Media Studies) that helped her land a summer internship and ultimately a job in her area of interest.
http://ase.tufts.edu/cms/internshipcredit.html
Just this year, a student won an international prize based on an interest triggered by an Ex-College course.
http://now.tufts.edu/news-releases/tufts-junior-wins-2015-global-peter-drucker-challenge
For many, EPIIC (sponsored by the Ex-College) was a unique experience.
http://www.tuftsgloballeadership.org/epiic-2015-overview
Here is a list of current and past course offerings (they change every semester):
http://www.excollege.tufts.edu/coursesCurrent.asp
http://www.excollege.tufts.edu/coursesPrevious.asp