John is a great host and very kind. He was on time waiting for my arrival. He gave some very useful hints about the area and what to do in London.
The flat is in good conditions, just the lock of the front door is a bit tricky. It is very bright and quiet. The area around the Elephant & Castle Tube station has some particular characters, but is it safe. You can reach Westminster walking.
The cats are shy, but during the night or in the early morning they could be a bit active, but John warned us about this, just give them some more food :) .
I would definitely return to this flat.