Not for everyone, but I liked it.
I travel to New York for work quite a bit and whenever possible, I like to extend my trip into the weekend and enjoy the city. Usually I book a room via Hotwire or Priceline and often get a great deal. That's how I ended up at Gild Hall.
There were a lot of positives to this hotel. First, it's 2 blocks from the subway in a very safe neighborhood. The room I has was very large by New York standards. I particularly like the quirky decor of the lobby, guest rooms and common areas. I think by far, the best part of this hotel is it's staff. To a person, everyone was super friendly and helpful. I felt less like I was staying in a hotel and more like I was staying in some private club. The staff just made me feel welcome. If you go to a larger midtown hotel, I promise you, that's hard to find. Before I forget, I loved the prosecco at check in -- it was a really nice touch.
That said, there were some negatives, but just a few. First, the guest room was super dark. I mean, there was no natural light. Part of that is the Financial District location, but most of that is the hotel's design. If that's important to you, don't stay here.
Also, I was there on a Saturday morning and they only offered a continental breakfast in the bar for $15. I skipped it and had a full diner breakfast around the corner at the Pearl St. Diner for less than that. I honestly don't think you can be considered a 4 star hotel if you don't serve breakfast, but somehow, Gild Hall pulls it off. If a weekend breakfast is important to you, don't stay here. (I think it would be smarter for the management to offer this continental breakfast free on the weekends, but that's just me.) 
I also had a technical glitch with my TV -- something about the cable connection meant the audio wasn't quite right. It wasn't enough to complain about, but that and a few housekeeping details -- like a missing bar of soap -- made me think that the very pleasant team needed a bit of work.
Despite these hiccups, I would return, mainly because of the friendly staff, the good price and a convenient to the subway location.