I stayed in Stefan place for a week and would highly recommend, its open and spacious, great value for money, located in a safe area and close to the tubes & buses!
Everything within the apartment is connected to Alexa and motion sensor (took some getting used to but very much enjoyed it) it has a lot to offer with a well equipped kitchen, TV with all guest account, work space and good views.
Stefan was great with communication throughout the stay and was easy with instruction for collection of the key. I would definitely stay again when visiting London!