I always return to the Michelangelo!
Every time I go to NYC, I explore all the other options: with memberships in "The Leaders Club", among others, I always start with their properties in Manhattan, and every time I come back to the Michelangelo. Why? Because none of those hotels (and all the other 5-star ones you are currently considering!) comes close to the quality-price ratio that the Michelangelo offers. The price of rooms at the Michelangelo (and the perks that come with it if you are a member of "I Prefer" - highly recommended) compared to all others clinches the deal every time. The rooms are generally very large, spacious and elegantly furnished. In many stays at this hotel over the years, I have never had a disappointing room; every one has been over-size, tastefully decorated, with separate dressing/make-up area, large closet, and comfortable bathroom with separate soaking tub. However, there are MANY different room configurations, and some of them do NOT have windows facing outside. In fact, on my most recent trip, I was given an upgrade to a suite, which had windows in both the living room and the bedroom, (on opposite walls) all of which looked out onto an airshaft, with absolutely no outside view. And my cell phone didn't work in that particular room, although texting did, so people just called me on the hotel phone if they didn't want to text. But the lack of view didn't bother me, (even though in some circumstances this would have felt totally claustrophobic) because it guaranteed me the quietest, best night's sleep I've had in a long time! Knowing how noisy NYC hotel rooms can be, I was grateful to trade views for space and quiet, for less than $300 a night. But if views are important to you, make your preferences known, and your room can be right on top of 7th avenue; with the double glazed windows it is still a relatively restful night's sleep, although you'll still hear sirens and horns honking. 
Another nice touch is the basic continental breakfast that comes with the room, although it is over at 9:30, a bit early IMO. There is a selection of nice pastries - good mini croissants and other European style pastries - but the room is down in the basement and is horrible! They have got to do something about this room! Everything about the hotel is so elegant, and then you get off the elevator and walk into this breakfast room and you feel like you've just time-traveled back to a 1960's era Sheraton or worse! In fact, it is so awful that I couldn't bear to remain there for even 2 minutes, so I just brought my breakfast tea and goodies back up to the room and ate there, a perfect solution! The lobby has an actual restaurant, in a lovely setting, with the standard full breakfast fare (for standard high hotel prices), but I didn't eat here. The hotel also often gives you a coupon for a free glass of wine or other perk in the lobby bar.
I generally don't avail myself of services in hotels, so I can't comment on whether the Michelangelo is competitive with the Ritz, for example, in this category. But turndown is excellent, and involves a full cleaning and towel exchange. Check in seems fairly efficient, and I have always been given a room for early check-in IF one is available. If not, they'll store your luggage for you in their locked storage room at the front door. I agree with others that tea or coffee making ability in the room would be nice, especially since most other hotels in this category (and lower!) do and in fact these days are actually providing nice Keurig or Nespresso machines. 
A small detail seldom commented on is elevator wait-time: what I love about this hotel is that there are enough elevators and I have NEVER had to wait more than a few seconds for one, something you can't take for granted in hotels! I hate it when you have to wait 5 minutes for an elevator, common in larger hotels, and even 5-star ones.
I highly recommend the Michelangelo, and don't see how anyone could be disappointed here, especially considering the savings it represents over other 5-star hotels.