Staying in Carl's house was a very nice experience and I'd like to thank them for it. We stayed for three nights and everything was expected, plus the breakfast which was a very nice detail. The trip to the Centre of London takes about 30 minutes, and the tube is a 5-minute walking distance, in the Central line, which took us to the most important spots.
Also, we enjoyed the privacy but at the same time, knowing that the hosts were very close in case anything happened, which fortunately wasn't necessary, because they provide us with everything needed right from the beginning.
We would definitely stay there again.