I got a kick out of reading the reviews for this place. I get the feeling there are a lot of non-New Yorkers replying! First off, one has to appreciate the place for it's place in history--not many places can survive as long as this place, and that's saying something. Even if the food was awful, which it's not, you ought ot be getting a serious history buzz. This place is the history of America, dude!
I get the feeling a lot of people only know about pastrami from those sad, bland, polystyrene slices that come out of a package, are rife with preservatives and are served on rolls with mayo. NO.
This is the real deal. While not everyone beleives this is the best pastrami in the city, no one argues it's top 5, and top 5 in NYC means top 5 in the world.
This is authentic, not a pasturized processed food subsitute. salt and fat are a key part of the process. If you prefer lean you have to ask for it, but it's a common practice for deli regulars, so don't be shy about it. The fat, whether you keep it or let them trim it, provides the juicy unctuousness of the meat, and the saltiness and spicyness of the the meat is a clue to it's authenticity. The flavor of the meat--pepper and lalt and spices, beefiness, and greasy moistness spreads on your tongue like a complicated french cheese. Take a minute and notice the way the flavors change on different parts of the tongue.
What sets Katz' apart from all the others is the hand slicing (please don't ever say "too thick", that's ignorant). The hand slicing really brings the texture to the fore, and pastrami is nothing without the unique grain of the meat. Thick slices present the springy, moist body of the meat fibers in a way that thin slices can't. In fact cheap pastrami has to be cut thin because it's dry, tough and stringy.
Sure it's expensive, and yeah, not everything is great on the menu, but if your experience of deli food comes from something like Applebees, or an all-night Korean bodega, please realize that you're stepping up to the big leagues here.