My husband and I stayed at Nicolas' flat from Sept 2-6. We did not have the chance to meet Nicolas as he was away, but nonetheless, communication with him was prompt and pleasant. He arranged for his house keeper Carmen to meet us at the apartment to check in. Carmen met us at the arranged time without difficulties.
The flat is in a great neighborhood/location. There is a tube station 5 mind away, and this was always our starting point to navigate through the city with ease. The flat was just as described, and clean. The flat served our purposes well. Would recommend.