We had a great time in London, and Stephane's apartment was a well-connected place away from the hustle bustle to sleep and hang. It's about a 5 minute walk to the underground through a beautiful courtyard. Once on the underground, the trains are quick and efficient, and you're only a few stops to London Bridge and Leicester Square. The Northern Line is very convenient and runs through many of the best attractions.
There are several grocery/quick stop areas around the apartment, and a few restaurants. The nearest restaurant/pub has solid food, and it's only ~10 meters away.
We came back late at night and never felt unsafe. It's not the trendiest area in the city, but that can be a good thing, especially when it's so connected to everywhere. Brixton is a quick bus ride away, where you can get your hip and trendy fill.
As for the apartment itself, it is clean, tidy, and has everything you would need for a stay. The pictures are very accurate, and the garden/balcony outside was nice. Bed was comfy. Shower was modern and worked well. Kitchen well-equipped. TV with many channels (loved the British channels). My wife and I had a 3rd person (her brother) stay on the sofa bed for a few nights, and he said it was comfortable.
Highly recommended! Thanks, Stephane!