I had an extended stay here from July-October and it was an overall great experience.
Pros:
Location/proximity to Georgetown University Hospital. I was in the area for contract work at the hospital and my commute was a 15 minute walk through the neighborhood, 5 of which were through a forested green space. Your stay is located in a quiet, peaceful Georgetown neighborhood that is accessible to the rest of the city via the Metrobus.
The space is equipped for what you might need for the weekend or for the season. I stayed here during the late summer months and found what I needed to get by on my day to day. The whole space was clean, well equipped, and had long-term amenities such as a washer/dryer, cookware, and paid neighborhood street parking.
Alan, your host, is communicative, respectful, and accommodative. He answered all of my questions about the space and neighborhood, addressed the few concerns I had, and asked ahead of time to enter the space to perform routine maintenance or housekeeping.
Cons:
The location can also be a con depending on what you're looking for. This is a private, quiet neighborhood in Georgetown inaccessible by the Metro train alone. Wisconsin Ave and M Street are easily accessible by walking or by the Metrobus, but getting anywhere else in DC requires a little bit more time and effort. As my stay here was primarily for work at Georgetown University Hospital, I did not find this to be an issue. I also had a vehicle with me parked up front with a paid permit.
The space is laid out in a way such that the kitchen and bedroom are furthest from the window AC unit. This can result in the kitchen warming up quickly while cooking or the bedroom being a bit too warm overnight. This is alleviated with ceiling fans in the bedroom, entryway, and living room. It is nice and cool in the living room and dining area with the AC unit on.
I have not stayed here during the colder seasons so I am only commenting under the context of the late summer season.
Overall, it was a great and successful stay for my purposes. Given the opportunity, I would like to come back for another extended stay. I can attest to all of the positive reviews about this stay. Thanks, Alan!