I'm not a big fan of NYNY, mostly because of the crowds that it pulls in (it feels like Jersey people that come to Las Vegas and claim they are actually from New York). When it's less busy I don't mind it; I like the roller coaster and have had good times at Nine Fine Irishmen. The rooms are nothing to write home about, but the prices are pretty reasonable and I feel like you get about what you should expect for the rates here.
I'll say that they do take care of their frequent gamblers here better than a lot of other places. My mother and her friends have stayed for free a number of times because of time that their husbands have put in at the tables.
All in all I can't say that it makes my list of favorite places, but I do appreciate the way they handle their regulars. There are better places to stay in Las Vegas, but there are also much worse.