Sebastian is a wonderful and caring host, and he made me feel right at home as soon as I arrived after a long flight. His apartment is spacious and comfortable, with a lovely open living area with a kitchen, couches, and a small library of books if you want to spend a rainy day indoors. There's excellent wifi if you need to work, and also plenty of room if you want privacy (an upstairs entrance and bathroom for guests). I definitely recommend staying with Sebastian if you're visiting London!