Bryn Mawr graduate programs

Considering Bryn Mawr for sciences (physics, chemistry) How does the presence of graduate programs affect the undergraduate program/experience?

Do you think it enriches the experience or hinders it in some way?

With respect to physics, note that a student from Bryn Mawr recently appeared as one of the three LAC finalists for an Apker (a national award that represents the highest honor for physics research by an undergraduate student in the U.S.).