We had a lovely stay at Valerie's place. The location is great, Hyde Park just a few minutes away, the Diana memorial playground is great if you are travelling with kids. There are lots of underground stations within a 10 minute walk. The only slight negative was having to pick up and drop off the keys at a nearby shop (10 min walk away), with children, prams and suitcases this was a bit of an inconvenience but otherwise a good choice of accommodation for visiting London.