I am a Kimpton Inner Circle member and stay in NYC frequently. Ink 48 is a very nice choice in NYC overall.
The location is good. Although it is far west on the island, it is very convenient to places like Hell's Kitchen, Carnegie Hall, etc. It also has some amazing views of the Hudson River and Midtown from the rooms.
The rooms are comfortable and well appointed. The beds are great and the hotel is quiet.
The staff are quite good. I had a small service hiccup with my Inner Circle requests when I checked in, but this was quickly rectified by the attentive staff.
The only negative I can cite is that they have too few elevators for guest of the hotel. They reserve 1-2 for people going to the rooftop bar and staff, and this creates pressure on the remaining two elevators and the waits are sometimes too long.