I stayed three weeks at Jonathan and Celia's Penthouse Suite and it felt like a home during this time. Communication with Jonathan in advance was brilliant and Check In went smootly. Everything was super clean and as it looks on the pictures. The Longwood Medical Area is in walking distance and there is a 5 minute walk to the next metro station that directly brings you to Downtown Boston. I met Celia for a couple of times in the evening and enjoyed to chat with her. She can give you a lot of good recommendations for exploring Boston.
Thank you Jonathan and Celia for this great stay!