Had a wonderful stay at Helen & Martin's place - right in the heart of Madrid! Communication was great as were all the tips given to us by Martin. Easy walking distance to all the major sights made this stay even more enjoyable. There were three of us staying in the apartment so it was a little tight, probably best suited for a couple. The neighbourhood was very vibrant but noise was never an issue - we all had excellent sleeps the the master bed was extremely comfortable. All and all a very enjoyable stay and would recommend to family and friends.