I stayed at Gosia and Bruce's place for 1 month at a half. They are indeed very attentive to their guests needs. While my stay offered me the privacy and comfort I needed, I also enjoyed interacting with Gosia and Bruce, talking to them and feeling very welcomed.
The house is located near the Fresh Pond and it is ideal for walking or running. I was going to Kendall Square every week day and it was easily reachable by bus and then the red line.
I am highly recommending this place for it has the perfect combination of location, comfort and good company.