Lou's place is unbelievably nice. I stayed with him for over a month while I was working in London, and had an overall incredible stay. The place is super nice (clean, high-tech, with a great view) with a cozy bed, strong shower, and great, fully-stocked kitchen.
Battersea, the neighborhood, is full of up-in-coming restaurants/cool pubs and has my favorite park in the city as well (right next to Lou's place).
On top of all of this, Lou was the nicest guy in the world and was always happy to help point out places to go in the city as well as accommodate in any way. Overall, I'd give this spot a 10/10 - hopefully I'll be back soon!