We had a nice stay at Geraldine's flat. The location is quite convenient, being very close to Kennington tube station (3-4 minutes walk).
The layout of the flat is good, the kitchen and the living-room well suited to us.
Nice view from the balcony.
We slept well in the two rooms too.
As a bonus the internet connection is really fast (it is a cable-internet connection, probably. 50 Mb/s at least).