Had a great stay at Danny's flat!
Check-in was super easy -- Danny left the key in a lock box and provided the combination, which made things really simple.
I did get to meet Danny when dropping off my bags, and we stayed in touch, despite him being out of town. I had no issues, and all the amenities I could need were there. The neighborhood feels very safe and is really quiet at night.
The flat is in between St. James's Park and Pimlico stations, but I would recommend using the Pimlico tube stop as the walk seems to be a little bit quicker, and a little bit better lit at night.
I definitely recommend staying here, and will consider Danny's flat next time in London.