This is definitely a hostel, but a brilliant one by hostel standards. Nice to have an en-suite private room, even had a TV. The room was basic and fairly small, but clean and did the job, and included a fan, which was helpful as it was on the top floor and a bit hot in the summer.
Wifi was quick, reception staff super friendly, inexpensive breakfast, decent kitchen and a relaxed vibe, and the location is perfect for South Kensington. Thanks for a great stay!