Daniel made things very easy for us, I never waited more than an hour for him to answer my messages. Thus, he was very flexible on the check-in /out.
Regarding to the flat, it is perfect for a short stay. It is quite empty but it is not such a problem since we only stayed for sleep in it. Brixton is not very far from the center, and the tube is only 10 minutes walk.
This a very very good opportunity since the price is very low and the appartment is very spacious.
I strongly recommend Daniel for your next trip in London !
Tom