Very cool vibe, friendly staff, welcoming to all ages. Convenient location: less than 10 minutes to groceries (fridge, stove, microwave in room), same distance to underground station, even less to bus stops (one right outside the door), lots of places to eat within walking distance (a pub, fast food, breakfast/lunch, ethnic cuisine). Laundry facilities a wonderful feature. Also a restaurant on the ground floor for breakfast as well as pizza, and a small cafe area in the lobby.
Very close to Design Museum (10 minute walk), V&A and Hyde Park (both 2 stops on underground or short bus ride). Everything you might want to do is reachable.