I was visiting my son at Harvard for the Parents Weekend so my main concern was convenience. Kris' place is across the street from a church adjacent to the Harvard campus. Therefore I never needed a taxi, bus, metro or long walk to get to Harvard Yard, Harvard Square, the stadium or the beautiful neighborhoods. In my four day stay I saved both time and money in getting around.
The small apartment is actually very cozy. The only thing that may concern you is that there is a kind of steep, narrow step down to the apt. If you don't have trouble getting around then this place is perfect. Kris was super friendly and easy to get a hold of via text or phone call. There was very easy communication.