The Rental is a great deal. If you are trying to save a bit of money, you probably wont find a better value.
The location is excellent for sightseeing as it's just steps from the Notting Hill Gate tube station.
Check-in is automated and very easy if you down load the app. My flight was early and I was able to stow my bags at their Kensington High Street Office.
Some notes:
The Unit is located on the bottom floor. While this protect you from street noise, you do not have a view of anything and the light is from above.
The pictures make the unit look more luxurious than it is, as the headboard and the bedspread are missing.
The shower pressure is excellent and hot!
The TV Remote and thus TV does not work. I replaced the batteries, and still did not. I didnt come London to watch TV so I didnt care.
Lastly, the mattress is pretty poor, you can feel the springs.
Overall a good deal, if they would invest in a little money and time, this could be 5 stars, but I deducted one star for the mattress and 1 star other details.
If you are not going to spend a lot of time in the room, and want a safe, well located place to tour London, this is a good bet.