The location is incredible ! In a very nice neighborhood yet only max. 5 min away from great public transportation. It’s an amazing place for people who want to do a lot during their stay and start their day early. I recommend the bus line 8 that brings you to Picadilly Circus and you get to see some really nice parts of the city, it also takes only around 20 min (if traffic is ok). Also the museums in South Kensington are only 2 tube stations away.
There is a small Sainsburys 2 min. away from the flat and a Whole Foods and Boots equally far away. There are a few stairs up to the flat so people with heavy or a lot of luggage should be aware, I was thankful that Benjamin helped me with my luggage.
For german travellers: In case you don't know yet, it's not common to have sockets in the bathroom in England.
Für alle Deutsche die es noch nicht wissen. In England darf man keine Steckdosen im Bad anbringen, also müssen Föhn etc. im Zimmer benutzt werden.

Benjamin and Danni are a very friendly and easy going couple who were open and helpful whenever I needed their help or recommendations. It was very kind of them to lend me an Oyster Card they had to spare. Check-in, -out and communication was great.
If you arrive midday just be mindful that their son naps at that time and send them a message when you arrive, instead of ringing the bell.