Kirsten and Pascal were very kind and easy to communicate with!
They were flexible regarding check-in and check-out hours (bonus here!)... The flat is spacious and there is a lot of space in the living room to relax (or work if necessary)... Fully equipped kitchen, ideal for longer stays.
The location is perfect, very residential and quiet, 10 min walk from Baron's Court Tube Station (Picadilly Line - 45 minutes to/from Heathrow) and you can use District or Picadilly lines when visiting Central London (usually 30 to 40 min to everywhere in the City).
My wife and I were there for the whole month in July during their holidays, sharing the apartment with their flatmate and we loved it!

Thanks again guys, see you around.
Eduardo and Sandra.