I had a great stay at Gema's place! Her house is so cool and full of character. The room is in the attic, so I felt like I had my own private space to hang out in (the only thing to note is that the attic ceiling is pretty low, so you might be grazing your head if you're 6 ft+). Gema was really nice, and gave lots of suggestions of fun things to do in the area!
The location was great for me. I was in town for a conference in the Seaport district, so I just caught ubers and lyfts to the conference center, but Gema's house was an easy walk to MIT and the Red Line to check out Harvard on my day off. There's a sushi restaurant and a cute coffee place (with great waffles!) literally down the street if you need a quick bite. There's no long-term on-street parking, but I parked in a nearby garage for $20/day (cheaper on the weekend).