This is a lovely apartment. The location is wonderful (less than a 15-minute walk to Prospect Park, even closer to the Q train, and very near Flatbush Ave so you are near many restaurants, coffee shops, and bodegas). Prospct Lefferts Gardens is a great neighbourhood with a wonderful community vibe.
Konstantin is a warm and generous host who also gives you a lot of privacy. The bedroom is very large and comfortable. I stayed for 6 weeks and was able to work easily from home. The bedroom also has good A/C, which is essential if you're in NYC in the summer. As long as you love cats, this is a great place to stay (the cats make it even better).