I thoroughly enjoyed staying at Ramin's lovely place and warmly recommend it. The apartment is spotless and tastefully furnished. There is everything you could possibly need, from shampoo and conditioner in the shower to tea, coffee and much more in the kitchen. Although it is not separate from the rest of the house, and you can sometimes be aware of other (very quiet) people there, I found this to be a plus: it did not detract from privacy in the least and it gave me the feeling of experiencing an authentic London home lived in by authentic Londoners.
The neighborhood is leafy, affluent and studded with beautiful homes. Transportation to Central London is very easy and food shopping, pubs, restaurants and a range of shops are just a short (5-10 min) walk away.