The location is fantastic.
Turn right from the apartment to Hyde Park - great for runs, and Lancaster Gate station on Central Line.
Turn left towards Paddington Station for Heathrow Express, Bakerloo, Elizabeth lines.
The road itself is quiet, so away from the hustle of London traffic. The area is safe.
The inside of the room is of decent furnishing and deco.
The only caveats are (1) the room is suitable for max 2 adults and opening large luggage needs to be one at a time, (2) the spiral staircase down to the below-ground-level room is a bit narrow, please exercise care when handling large luggage, (3) the outsides of the apartment is a bit old with peeling paints off the wall, it didn’t bother me at all, but can imagine some may be bothered.
I was traveling alone, so this apartment was a perfect fit for me!