First thing's first - this is a lovely apartment, across the street from what is probably London's nicest park, there's a Tesco's two minutes away, good bus service to the tube, and a few decent/interesting restaurants around, couple of lovely pubs, take-out pizza - everything you need. Battersea is outside of the heart of London and it felt like a quiet respite to return to the place at the end of the day, while still being relatively close to the city center.
The apartment itself could use some plaster and paint in places, the tub in the main bathroom (there's a main and a master bath) was clogged, and for those with a sensitive nose there's veeery faint evidence of a smoker having previously lived in the place.
But aside from that - basically it's a beautiful two-bedroom, with big rooms, giant French-balcony windows that open up to the street, tons of light, lovely hardwood floors, great beds and comfortable furniture - a great spot, and I'd be happy to return to the same place next time I'm visiting in London.
As an aside, please remember that, with many places in London, you're not dealing with the owner - I never spoke to Martin first or last, never interacted with him, but dealt solely with 'Houst', the company that manages many of these properties in the city. While I personally find that annoying and I think AirBnB needs to create a mechanism to clearly state who guests are dealing with, I can't fault either the cleanliness of the place when we arrived or the super-fast and response customer service when I sent "Martin" (Houst) a message. So perhaps at the end of the day it's a win-win-win.