Really enjoyed staying at Simon's flat :) I stayed for two weeks in Simons.
The flat itself is pretty new, the common area and the room is clean and spacey, and I thought Simon is friendly and great host. The location of this property may seems to be far from tube station on the map, but there is the bus stop in front of the flat, the two buses take you to central London (the bus go through big ben!), one to Holborn and Kingscross area and have amazing access to everywhere. (Also if you walk 10-12 mins, there is Vauxhall tube/bus terminal and you can find more buses which goes pretty much everywhere in London.)
He was quick response to any questions and problems while I was staying and I find him helpful.
I will recommend this place to anyone!