Staying at Sofi's place was enjoyable and relaxing. You can't really beat the location for visiting Harvard. Sofi was very responsive and provided good suggestions on establishments in the area. We also noticed that Sofi has great taste in books and art, which we appreciated in our short time there. Being on the top floor during the summer, the bedrooms were quite warm and stuffy, though, the provided fans did help. Probably not an issue for most of the year. Would definitely recommend staying there at any point you're in Cambridge.