Place is just great, extremely comfy, tidy, impeccable, is just spotless and have everything you need and more to enjoy every minute of your stay, there is honestly nothing bad to say about the flat as such, definitely the best you can find in that price range.
As for the host, he's extremely kind, helpful and always replies quickly, he's fantastic.
Just to have in mind, all though chances are nothing is gonna happen to you, if you're going by metro/train you might want to get down in Μεταξουργείο (Metaxourghio)-Red Line, not only because it is closer but because the path from there is not shady/sketchy as it might seem coming from other nearby metro stations, but then again it is not something to worry about.
100% Recommended.