A+
Convenience and Cost
There are shuttles that run around campus very frequently. These shuttles are provided free of cost.
From Harvard, to get to Boston is simply a subway ride away. The subway costs $1.45, I believe, and the subway stop is right beside campus. There's actually a "Harvard" stop.
There are also buses that cost about $1.35 that will go anywhere the subway doesn't drop off reasonably close.
There are also taxis.
And, of course, there's always walking. Boston/Cambridge are wonderful walking/biking cities. There are sidewalks EVERYWHERE.