This is a lovely quiet apartment in a great location. We didn't meet Martin as he lives in France but he responded quickly to our emails. We were met by the doorman, Tito, who was always around if we needed anything.
We had problems with the wifi while we were there. It was great the first week - we streamed the entire Monaco Grand Prix live without any buffering. However it went off completely for a couple of hours one day and when it came back on it was slow. It was still fine for surfing the internet and getting emails etc. but too slow for streaming tv.
Other than the wifi problem, we enjoyed staying in Martin's apartment and would recommend it.