I had a brief one night stay at Yan's house for an event at the ExCel.
Yan was welcoming, and she was very accommodating when we wanted to go out for the evening, so we felt very comfortable staying over for the night.
The room itself was a good size for us and the house had all the facilities we required for a short stay.
Location wise Yan's was perfect for us - within walking distance of the ExCel and so we were very happy to have chosen to stay here.