Clean, generic, friendly - highly recommend A review of Hilton Garden Inn Queens/JFK Airport
We stayed at there for just 1 night, and while it's somewhat generic (esp the restaurant), it's very clean and very spacious as well. The rooms are very nice and overall the people working there were very nice as well. Also, the shower is a little wonky - you have to pull the O ring located on the faucet, placing your hand directly in the running water. Kinda weird, but again, not a biggie.
On a different note - I lost a very valuable pen while staying there. It must have fallen out of my bag and I must have kicked it under the bed. I called the Lost and Found, left a message, and they called back within 1-2 hours saying they had found it and after thanking the profusely, they are mailing it back via FedEx. More you could not ask for. Just for that fact alone I would stay there again - what other hotels in the JFK would simply have "not found" the pen and walked off with it. Overall, I can easily recommend this place.