The house is located at central square which is, as the name suggested, center of Cambridge. It's so close to every lively things in Cambridge including great restaurants, grocery stores, etc. If the purpose of the stay is related to eitherMI Harvard or MIT, Carolyn's place is more than perfect.
My parents stayed for a month here. They can easily go to the Charles for a casual walk or take the T to other more remote places which is just 3min away from the house. The house itself is obviously renovated recently with almost everything needed. Just bring your luggage and passion about exploring Boston/Cambridge!