Acceptable place, with a few infelicities. Bed mattress is not at all great. If you're over 6 ft tall. you'll be banging your head until you learn to duck down between rooms. Very small place. All chairs are straight-backed and barely cushioned.
These items were not present when I arrived, though they were provided on request: kitchen soap, sponge, kitchen towel, napkins or paper towels, an additional roll of toilet tissue in case the 3/4 roll provided is insufficient. Not provided but didn't notice until too late: salt and pepper. Also, gate and door entrance only via phone app so make sure your phone is charged. Mine wasn't, so spent first few hours in London stuck in flat waiting for phone to charge.
Upside: great location, easy short walks to Kensington Gardens, V and A, Nat History Museum, Underground. Reasonable walk to Kensington High Street. Host is responsive.
Overall, if you'll be out and away from flat all day, you'll be fine.