Francesca was very nice in every contact we've had, even we didn't meet. Also the ones in charge of check in/out, very nice. The apartment is very close to the city of London or the inner part, so the way to go there doesn't take you long. You can prepare your own food there, there is all what you need.
I cannot give full star, mainly because it used to be a smokers apartment and there is still a strong smelling. Also couldn't sleep with windows open (with closed windows it is very ok) and had a little problem with a clean bed too.