Do note that first floor apartment means one level above ground level. There is no lift in the building because it's not a modern building, but Ramona was nice to assist me with carrying my luggage upstairs. There were other guests sharing the flat at the same time in their private rooms, meaning the common facilities such as kitchen and bathroom are shared by more than 2 people. Because the bathroom is compact, everyone had to keep their own towel etc. inside their rooms to allow everyone to be able to have enough space to use when they are bathing, so pack a tote bag to make it easier to carry your things to/from bathroom. The bathroom taps are the separate hot and cold water knobs type. The room can get warm during daytime in summer, and there is no fan/aircon in the flat (typical for UK and Europe). In June 2019, I was able to let the warm air out at night by opening the window, but made sure to close it for safety before I went to bed.
Otherwise, the flat is CLEAN and well-located. It's about 5-7 minutes to Gloucester Road tube station where the supermarkets are, and 10-15 min walk when wheeling luggage to Earl's Court station. Earl's Court station is wheelchair-friendly which is so important if taking the tube with luggage to/from Heathrow Airport.
There's a mirror facing the table and another mirror on the cupboard door which are useful for getting ready in the morning.
As a solo female traveller, I felt safe because of the neighbourhood and because there were locked doors to the building and to the flat, and to my room.