My friend and I really enjoyed our stay:
The apartment is beautiful (and clean) and at the same time, we felt like home: Lydia and Alex are cool and considerate.
If you plan to come by car, just ask them if you can park on their yard. Indeed, the street provides no free spaces and boobies act quickly ;)
The place's out congestion zone, so you'll be able to reach the city center by bus or train/tube (stations a few minutes away).
Thank you for this happy yet peaceful stay.