The owner went above and beyond to make sure I had a pleasant stay. When I had trouble finding the place he came to get me and he explained everything about the apartment in person. It's a really comfortable place to stay and only 9 minutes walk away from the castle. Only thing I'd recommend is booking restaurants in this area in advance. I was lucky enough to get open seating, but Old Town is still very popular right now. And bring sturdy shoes for icy sidewalks.