3rd floor, 7 flights of stairs, no lift; this is the only reason to give 4 and not 5 stars.
The flat itself is definitely 5 stars:
beautifully decorated, brand new, spacious, lots of light and in a very quite zone just in front of the park.
Owner very kind and attentive service; lots of useful suggestions for things to do nearby.
Will definitely come back (with fewer luggage).