I stayed over at Ian's for almost 2 weeks and I thoroughly enjoyed my stay there. The house is centrally located and very close to restaurants, supermarkets and convenience stores. It's at walkable distance from MIT and is in a good neighborhood. The house itself looks exactly like the advertised pictures, and is very well decorated by Ian. I would even go on to say that it's got an old-house charm with a modern vibe to it.
Ian on his part is friendly and helpful. I was able to coordinate with him for an early check-in when my flight landed a little earlier than expected. He's definitely a good host.
Overall, I'd highly recommend staying here, especially to those who work at MIT!