The apartment is very nice and very well located.
As I told already personally to Joanna the bathroom should be warmer. It is cold and in wintertime it is not a big statement for the flat.
An other suggestion, would be to have more space in the clapboard in the room. I didn’t even unpack my hand luggage because of that and the last thing they could provide more comfortable pillows.
Aside from anything I must say they are a couple very nice and friendly and if you want to spend few days in a nice area in London in a conformable house this is a good choice.