The appartment is perfect for two persons, nice and very clean.
Even though you are a bit far from downtown, you have several options to get there:
Subway Gold Hawk station is 5-10min walk and the area is much more crowded. Otherwise you can walk 10+ min to get Hammersmith station (same Line as Westminster) and you walk through quiet and nice victorian streets.
Finally, the best option remains Bus 94 which goes directly to picadilly circus and is just down the appartment. Very convinient !
Lana was helpfull and provided advices about « best to do in london ».