A friend and I came to London for a Festival in HydePark and had a great stay at Sylvans place. It was easy to reach from Heathrow and the area is very nice and has kind of a 'local' feeling. We went out there for a beer the first night and had a decent breakfast the second morning :)
The room and all the facilities were nice and clean! Wifi was fast!
Sylvan was very helpful and guided us to nice places in the area. Definitely a recommended stay if you come to London!