Spent a long weekend @ Christoph's beautiful apt.
All to all, the experience was absolutely great - the apt is well located (5 min walk from train & tube) clean, bright & welcoming!
It is spacious and well-equipped, and the heating system kept us nice and warm in the cold December.

The only thing is that we agreed that we will leave on Sunday at 17:00, while Christoph arrived at 15:00 to clean.. This created an unpleasant situation for our friend, who was much surprised, being on her own in the apt.