We enjoyed our stay at Violetta's place.
It was confortable for all 4 of us (we used 3 beds). The two main beds are confortables, the sofa in lounge and the single one in chamber 2 are not very confortable for heavy peoples.
The appartment has everything you need (except a dishwasher), Internet and Wifi is high speed and there is a big TV with many channels.
The location has good connection by bus to Victoria station (10mn after a 500m walk) and close to a small supermarket (700m walk).
It is also close to big battersea park that is great for jogging and walking.
It is safe and quiet although it may not look like at first. There is a children garden just in front so it can be a little bit noisy up to 22h if there is no school the day after.
The only drawback (as all other locations in the south west of London) is the proximity of Heathrow airport, so you hear planes at low altitude from 6am to 11pm.