Eva, in some places, like NYC, it's more economical to stay in an apartment. I've done this world-wide - just booked one in Provence. For the sake of a 5 minute walk and a 15 min. subway ride, you can save a lot of money. Her places are uber-clean and in a safe neighbourhood. I really recommend apts for 1 week or more.
Edit: Take a look at the Manhattan hotel prices and then see if $50/night doesn't make sense (for the sake of half an hour, especially)
I wouldn't go back if I didn't feel safe.
JTT - get out of this thread, please.