The apartment is located in Petersham House, 29 - 37 Harrington road almost in the hearth of South Kensington, near to everything that you need, including South Kensington train station, which in return means that the train is passing under or near the building every 10 to 20 minutes. So If you plan to stay in the apartment during the day as we did, you will notice it after a while. Fortunately the tube is not ruining at night.
The building doesn't look like much from the outside but the apartment itself is realy nice, warm and spacious. Especially the big, well equipped kitchen if you plan to have some home prepared meals.
At first, the pick up keys location was 15 minutes walk away from the apartment location but then the Kenneth's support team was kind enough to move it to just 3 min walk.
Travellers tip : there is a farmers market every Saturday just around the corner from the apartment.