Stayed at Sherif's place over the weekend with a friend. Didn't meet Sherif personally, but checking-in and out was no problem, as we received precise informations. Communication before and during the stay was fast and easy.
Location of the appartment is great, very close to Marylebone station (5 min. walk) and only a short distance to the main places in central London. Neighbourhood is safe and quiet. Clean accomodation, with all the things you need during your stay. Overall a good experience.