Found this to be a very nice base for both sightseeing and shopping in Manhattan. Good neighborhood, close to good eateries like the Snack Shack and all the Indians a few streets up.
Male dorm was ok, pretty small and just a small window, aircon rather loud, beds extremely squeaky, bring earplugs! Shares bathroom just with next door (female dorm I think) and there are plenty other options across the hall. Good washing ($5) with detergent/softener provided. Internet speed is ok, wifi free and computers $1/half hour. Staff is variable, Fabi extremely friendly, Sebastian really nice, Perry a bit dejected and only sometimes helpful, and there was also a girl I did not even dare ask for her name as she was looking so mean at me all the time ;). Very good breakfast, 7-11. Very clean.
Big thing that is missing is a common room. My advice, take that bathroom out, break down the walls and connect internet room to kitchen. Such a shame there is no place but the small cramped dorm room to meet the fellow travellers. The kitchen is too small and you won't see if someone is in there when walking past, same as internet room, so that's not working at all.
Too expensive. Really, $59/$69 (weekends) for a dorm bed? Sigh, I guess it's what you pay in Manhattan. Think about going to Queens (Q4 and Westway Hotels were recommended to me by others that stayed there), if it's too expensive for you.
All in all, Manhattan makes you put up with a few downsides, and if you dont want to stay in the huge HI uptown (with lots of 20year old party crowd I'm sure), probably your best bet.