Sue/David's place is not only beautiful (the woodwork on the stairs alone is incredible) and comfortable it is perfectly located for exploring. Don't forget good walking shoes!
We stayed for a conference at the Boston Convention Center. We opted to skip on a rental car (you really don't need one) and took taxis to the convention while using our legs and the subway for everything else. We enjoyed meals at SRV, China Town (go with an empty belly, the food there is amazing!) and Little Italy to name a few stops. We walked to a game at Fenway (go plenty early and be prepared to say wow..There is much to do and see outside of the stadium). I have never cared for baseball, so I have never watched a game. I am now a convert. We got to know everyone sitting around us even though we were not chearing for the home team. I had loads of questions and it got to a point where the people sitting around us started piping in with explanations and began pointing things out to me. Really was a highlight for our trip.
Next time, we would like to go to the symphony which is just down the road.
As to the house itself. When they say stairs, they do indeed mean stairs. After a long day of walking those stairs look considerably higher than they truly are. But, each room has its own temp control and soothing AC. Once you breach the threshold the climb is quickly forgotten.
The kitchen has everything you could want/need. If you like listening to music, there are a couple of speakers you can sync your phone to. The little JBL packs quite the punch for being so little. There is a table in the family room which was a perfect work station for myself and there are views from every room. There were plenty of linnens/towels and a washer and dryer if you should happen to need to freshen up.
Last piece. Bring your camera up to the roof. The views at any time are pretty and they become spectacular in the morning and evenings.
You won't be disappointed staying at this house, but you will find yourself wondering where the time went!