My mother and I stayed at Alex' place for 2 nights and we really enjoyed our stay!
The apartment was clean and spacious and the location was just great. Very close to Oxford Street for shopping and most of the other sights were close by as well. Also there are supermarkets and many cafes and such right around the corner.
The noises in the morning, that Alex mentions in the description were pretty loud one morning, but the other morning they were quite all right though. If you're not a light sleeper, you will be okay.
Though we didn't meet Alex personally, he was a really good host to us! He provided us with all the information we needed and always answered pretty fast and patiently to all the questions I had.
All in all, I would really recommend staying with him, if you're looking for a central and not too expensive room in London.
Thank you for everything, Alex! :)