Robin's place is in a nice quiet area in West Kensington. It was easy to find and close to two tube stations.
The description was a little misleading. Yes, there are 25 steps to get to the apartment door, but then immediately as you open the door there are another flight of stairs which lead to a small landing, then stairs one way to the kitchen and the opposite way to the living/sleeping areas (I think it was roughly 50 stairs in total). There is also a flight of very steep stairs to go down to get the key before checking in. If you have bags or mobility issues, this is not the place for you.
Other than the stairs, the apartment was clean, quiet, and in a great location.