Great hotel if you are looking to get to know the city and not just the inside of your hotel...
I've stayed at Hotel Carter twice (Jul 2011 and Feb 2012) and I would most definitely come back. The rooms were cleaned everyday (exception of the day before we left) and the employee are extremely nice and ready to help. The first night we were in a room facing the main street and there was a loud noise every time that car passed by, I talked to the front desk and they were pleased to change our room. If you chose a room for 3+ people of course there won't be a lot of space because of the big beds, but if you get a room a couple you get a lot of space and a huge bed. 
I don't think I need to mention location as it is amazing...
Honestly, people should inform themselves because when it comes to NYC you get exactly what you paid for. If you want newer, prettier and perfect hotels, you should be prepared to spend money. Otherwise, Hotel Carter is great to spend a few days in the city, walk around all day, and come back at night to a nice and warm bed!