Two things to be aware of about Hilton's Flagship property:

1.) The W=A has no 'Towers' level. It has an Astoria level. It's only 3 floors with about 15 "rooms" on each, many of which are junior or full size suites, so people shouldn't be put off if they don't get the upgrade to those levels because there are plenty of people who pay for those rooms, especially in the busy season of Spring, Fall and Christmas.

2.) The Astoria lounge on 26 is only available to people on 25-27 (the Astoria level in the W=A) and all guests of the Waldorf Towers (floors 28-42). Since the Towers is, in fact, a completely separately managed and operated hotel, it's rare for a W=A guest to be upgraded to it. In 100+ nights there over the past 2 years, I had ONE upgrade to an oversized room there. All my other nights usually had a nice upgrade in the W=A somewhere.
But the lower floors up to 25 have many rooms, and many various suite types on each of those floors.

If you do not get a room that's eligible for Lounge access, you are entitled to breakfast coupons for Oscar's restaurant on the ground level on the Lexington Ave. side. They usually give them without asking, but make sure you get the coupons if they forget. You can also get, in lieu of these coupons, 2 drink coupons to any bar/restaurant. At $11 for glass of wine, they come in handy.