Jeroen went out of his way to let us have a comfortable stay, even though we booked very last minute. We met him during the check-in, he showed us around the apartment and gave us tips about the area. During our stay he checked a few times if everything was alright and was overall very responsive. He's a really friendly guy!
The apartment itself just got a style update and is bright, cosy and - given its very central location - surprisingly silent during the night. The bed is very comfy and everything was clean.
Beware of the steep stairs, but I guess that can be said about most Amsterdam listings :)
Overall I would definitely recommend booking with Jeroen!