I spent 5 weeks at the Brownstone. The suite I was promised was not the same suite I received, although the owner did whatever she could to make it right.
The unit badly needed a thorough scrub. Again, probably just an oversight, and the maid, Sophie, who was very nice, was deeply apologetic. I ended up having to clean the floors and the unit inside out as maid service is only offer upon check in and not during the stay.
The backyard was fabulous - had a number of BBQs for friends there and the owners was very nice about that.
Wifi and phone issues were ongoing. When it was brought to the attention of the owners, she was very defensive, unfortunately. I decided to stay at a hotel my last week.
Overall, perhaps best meant for a weekly stay. Be sure to rent a vehicle which the owner can arrange for. The location is in a safe residentail area, 2 blocks away from the Prime Minister's house. However, there is nothing within walking distance, taxis...