My wife and I have been visiting Amsterdam for almost 20 years - we never had such a comfortable experience. The place is smack in the middle of the red light district - so very central. Coffeeshops a few steps away and the terrace is a rare gem to find in Amsterdam - no need to sit in cramped coffeeshops anymore!
The hosts are very nice and hospitable - one day the whole apartment was wafted in lovely aroma and Martin invited us to join his family for dinner. I wish it could have worked with our plans because it smelled delicious.
For our next trip, we'll be first looking to see if M&M's place is available.