I stayed in Hermina's house in the first 4 weeks of a longer stay in Boston. Hermina is very nice (she offered dinners several times), the house is big and reasonably clean, and my room -- it must have been room B -- was big and very comfortable. Dorchester, the neighborhood where the house is located, is not the richest (and also not the most expensive) place in greater Boston. In any case, the red line (with the field corner station really close to the house) enables a quick connection to downtown Boston. While I have moved to another place in the meantime (mainly to avoid to commute every day), I would definitely return to Hermina's house for a shorter stay.