I've stayed at Gya's for 7 weeks and I've appreciated my stay here for many reasons. First, she is a very nice and thoughtful host; she waited for me and welcomed me when I arrived, during my stay she was always very prompt to answer any of my questions (we communicated mostly by email), and she provided helpful information regarding restaurants and supermarkets around. Moreover, the apartment is spacious, nicely decorated, and quiet. The bed is comfy and I had a good sleep during my stay - also a good point! However, there is not a lot of natural light in the rooms - which may not be a big deal if you're out during the day.
Regarding the location, the A/C or 4/5 trains are not very far and will transport you to Manhattan quite quickly. Also, I should mention I really liked the neighborhood! I always felt super safe and discovered a lot of amazing cafes and restaurants around, mostly on Nostrand Avenue. This is definitely a great area to discover.
In short, I recommend Gya's place!