Firlian is one of the best hosts I've ever met. He is very hospital and will help you with everything you may need. The house is old-fashioned but it is fully furnished and the rooms are very comfortable. Even if the house is located a bit far from the city center, the bus stop, the subway station or the grocery store are at walking distance.
I would generally recommend staying at Firlian's: you will definitely enjoy your time with him and in Boston.