We just got back from a perfect stay in Martin's apartment. Everything was nice and clean, just as shown on the pictures.
The flat is very well located, just a few steps from the underground station and a supermarket. And if you like to have a nice walk, a lot of interesting places are not too far either.
Plus Martin was very helpful, waited for us to arrive even if we were very late (sorry again for that!) and let us store our suitcase on the last day.