We loved our stay in Amsterdam and Martin's flat. The flat is spacious, modern and equipped with everything you might need. Martin is very good host and well organised and replies very quickly to any questions or messages. The flat is very well located and we really felt like we experienced Amsterdam. The only thing I may say is that as it clearly states smoking is allowed, if you are non-smoker, you really do smell the smoke in the flat no matter how much you air it out. That being said the flat is very clean and tidy.