We had a great stay in this location -- it was exactly what we paid for. It's very cheap and you get lots of space for the price (two bathrooms!). It's also perfectly located, with a bus stop right in front of the house, a library nearby, and in between the Davis and Alewife T-Stops. For students, it couldn't be any better.
However, that is important to note -- if you want luxury, this is not for you. The beds are extremely high quality and the host responsive, but the house is old and the kitchen is beat up. There's no working oven although the stove top works (2/4 burners) and they provided a toaster oven when we told them. One of the rooms is near the street and will be noisy, so bring earplugs, but the other room is very quiet.
Again, remember that you're getting what you pay for -- in Cambridge, this place is a steal! We were very happy with our stay. Highly recommend to those students looking for a cheap place to stay while visiting Harvard.