How are the dorms? Are the bathrooms shared in all of the dorms and are they shared only freshman year or all years?
Freshmen dorms are hall bathrooms. Sophomore year you can get a suite with a bathroom shared with a few other students or you can be on a floor with hall bathrooms, it all depends on your luck in the housing lottery. By junior and senior year you should have a suite bathroom shared with a few other students.
The dorm as BC are pretty nice, but they vary. Not everyone is guaranteed on-campus housing for all four years. Some freshman are placed on the Newton campus, but that is very close, the buses run frequently (you can walk it if the weather is nice) and the freshmen vibe there is pretty cool.