Kelly's flat is only a few minutes from West Ham station, which is on the District, Hammersmith & City, Jubilee and DLR lines. It's amazingly well connected & convenient. You're also a 20 minute walk from Stratford; if the weather is good you can walk along the Green Way which is a nice way to see the area.
The flat itself was lovely. Really lovely. It's so well decorated, light and spacious. I really liked staying there.
Kelly is also a very welcoming and easy going host to stay with. She has good knowledge of London and is very helpful.
Just note there's quite a few stairs to her place.
Great value!