Onno is a fantastic guy! Gave me great advice for getting around his neighborhood and how to best the enjoy Amsterdam.
The apartment is in a gem of a location and additionally, if you show up with a car (like I did) there's parking! Always a huge plus :)
I found the apartment to be cozy, sleek, more than comfortable enough for 1 person, and light/bright. Certainly recommend staying with Onno as the host + apartment combo is almost unbeatable in its awesomeness :)
On top of it all, the description of the place is exactly what you get and the wine provided on arrival was excellent! Helped me start my Friday evening off right for sure.