We stayed at Andy's place for 5 nights in May.
Firstly, he was there to greet us and was extremely friendly and welcoming - he gave us loads of tips on what to do (we went to Fette Sau and the Mexican place!) and left us some beers, chocolate and wine (sorry we didn't get time to drink the latter).
Our first couple of nights in the flat were bliss, it's comfy and reasonably clean, he also has Netflix and wifi! We had great a nights sleep for our early starts to explore the city and ate our breakfast in the morning sun which falls in the garden. We felt very safe in the flat as well.
Unfortunately, during the weekdays our sleep was not as good for 2 reasons: 1) the walls are very thin and the neighbours played their music very loudly every week night until late, we could also here TVs playing from upstairs/next door, to overcome this I would recommend packing some ear plugs 2) I think we were unfortunate in our timing as the next door neighbours decided to demolish their front garden whilst we were there and on week days they started before 8am with a sledge hammer! Again ear plugs could've helped and it is a city after all I suppose. On the plus sign you hear minimal people/traffic noises as you might in Manhattan.
Our check out was also very smooth - Andy let us leave our bags so we could pick them up at a more convenient time and this was super helpful/easy to do.
The location to bars/ restaurants is fantastic and the links to JFK and Manhattan are brilliant.