Loved our stay at the Grand Hyatt
Travelled to New York from Australia to meet my mum and sister for a family holiday and we stayed at the Grand Hyatt from the 8th - 15th June. We could not have been happier with our choice. Beautiful,modern hotel in the perfect location for exploring the city.
We had a Grand hyatt room with 2 double beds on the 31st floor. We were not expecting the room to be as spacious as it was (from research i knew hotel rooms in NY were small) but the room was great - perfectly sufficient for 3 women and all of our shopping bags! The large walk in wardrobe was fantastic to store all of our luggage and shopping. The furnishings were lovely and modern and the beds were really comfy. Bathroom (as i had read on some reviews) was on the small side but again, did us fine. 
Just a couple of things slightly on the negative - a lot of reviewers seem to comment on the absence of tea and coffee making facilities, from one source this is due to health and safety regulations. We bought a cheap kettle for the week it was no big deal. The room keeping service was also a bit hit and miss, some days it really looked like nothing had been done except the towels replaced and the beds made - the bathroom or countertops were not touched. But we did have a lot of bags and belongings left around the room which would have made a proper clean difficult. Also, free wifi (even in the lobby area) would have made the stay perfect, instead we ended up paying close to $80 for standard wifi (sufficient for our needs) for the 7 days for one device. 
The location was fantastic, 10 minute stroll to Times Square, where we ended up most evenings for dinner, shopping, 10 minutes stroll to the Empire State Building, Maceys etc, 5th Ave, and because the hotel was attached to Grand Central, everywhere in Manhattan was easily accessible. One day we went to Jersey Gardens outlet mall and caught a bus from the Port Authority Bus Terminal which again was just a 10/15 minute stroll from the hotel. The surrounding area was nice and very safe at night. Taxis were always easy to get directly outside the hotel.
The Market in the Lobby area was great for picking up juice, tea and pastries in the morning for breakfast on the go. Other than that, we didn't eat in the hotel. We did go across the street to the Pershing Square cafe quite a bit and found that to be great for both breakfast and dinner, very reasonable, good service and great food. 
Overall, we had a fantastic stay at the Grand Hyatt. We would highly recommend it and look forward to our next visit! A special thanks to Angela, house keeping on the 31st floor who looked after us so well during our week there.