Firstly, Antonio is a superb host. Through no fault of his own the gas was shut off on our first day meaning that we could not shower when we arrived (the fault was due to one of the neighbours). Antonio messaged ahead of time to let me know and made sure to gas was sorted as soon as possible the next day. And although we had not been very inconvenienced by this he refunded some of our money after we left, completely unprompted!
The apartment itself was clean and well kept. We were each impressed at how quiet the neighbourhood was and were not disturbed at all. One thing to consider is that noise travels within the apartment so if anyone is watching TV while you are in bed next door you will hear it word for word. Or perhaps my father is just losing his hearing...
Connections to Downtown and Midtown Manhattan are easy and quick via two subways. However I don't believe Antonio's assertion that you can be in the city within 20 minutes is correct. Maybe if you were very lucky and all subway connections lined up perfectly, but really it's going to be more like 45 minutes. But this is still a great time to be in and out of Manhattan for the price you are paying so do not let that dissuade you!

I would say that the wifi was not very helpful. My laptop connected to it fine but it was not strong enough for any of the phones and tablets we brought. I guess this is as much a reflection of how small devices are not so good with these connections, but be aware that if you are planning on using iphones/ipads to plan trips out you may struggle.
Lastly I would say that any negatives I have written here are completely outweighed by the huge positives of having a helpful and communicative host and a cosy and quiet apartment. I have included the small negatives just so other people can have as much information as possible, but would heartily recommend this apartment to anyone. I know that when I next come back to Brooklyn I will be firstly checking if this place is available.