We had a wonderful time staying at Martin's studio, the room was spacious and comfortable with everything you could need (very large bed, bathroom and breakfast facilities, tv seating area with Chromecast) and of course the wonderful terrace which was a perfect place to relax after a long day of sight-seeing. The terrace is completely private and not overlooked by any other apartments, and despite the very useful central location of the apartment in the red light district, it wasn't too noisy at night - we were able to sleep with doors and windows open for fresh air and there was also aircon available which was perfect for the summer heatwave.
Martin our host was really helpful and friendly, willing to give recommendations for activities and places to visit as well as assisting with checking in and making sure we were comfortable. The studio was clean and nicely prepared for our visit, and had full tea and coffee making facilities as well as some welcome stroopwaffels (a very delicious Dutch snack which you must try!)
There are a lot of stairs up to the apartment (standard for Amsterdam houses!) so by the end of our stay I felt like we'd had a workout every day walking up them! There are also two lovely friendly cats who were very affectionate and made the studio feel like a home away from home. Ultimately this was one of the best stays we've had at an airbnb, and will definitely be returning if we are in Amsterdam again!