The apt is very well situated in amsterdam and there are many public transportation around. It is perfectly clean and fully equipped -even in the kitchen- so you just need to bring your own stuff.
The stairs -especially the last ones- are not easy but no different from the pictures. And for all parents: there's an additional security barrier that is not shown but very reassuring!
Last but not least, Ewout is extremely reactive and accomodating....Great place!