My wife and I had a great stay at Olena's. She is friendly and welcoming. The room in which we stayed -- set in an English basement of a 1930s, two-story, brick row house, located on a quiet and well-maintained street in a residential neighborhood -- is very roomy and private. It shows its age a bit, but is clean and comfortable.
The bus stops a short walking-distance away, and nearby, along Wisconsin Ave. are a bunch of shops and restaurants. The walk to Georgetown was pleasant and all downhill. Oddly enough, the walk back was all uphill -- you might consider taking the bus instead, or the multitude of available, app-accessed, personal transportation choices (PTCs??).
We didn't drive to DC, so I can't really speak to the parking situation around the neighborhood (e.g., in terms of the streets being resident-only or not, like in other parts of DC), but I did not see an abundance of available spaces in the evening -- maybe other guests have commented on this point.
Overall, we were very satisfied with Olena's place and would gladly stay there again.