Zach's place is really cozy and well located. It's close to a few subway stations and a bunch of bars, cafes and restaurants. It's close enough to Brooklyn, Lower Manhattan, Midtown and Upper Manhattan, which means you can get to all the main tourist spots very quickly and without a lot of subway transfers.
Beds, pillows and linens are top quality, so we were able to sleep very well the 8 nights we were there. The kitchen is well equiped! There are grocery stores (and a Whole Foods) nearby, which can save you some time and money if you wanna cook at the apartment.
Overall it was a great experience and we would surely stay there again in the future.
Just a tip for light sleepers: the living room (where the sofa bed is located) can get a bit noisy (especially on Friday and Saturday nights) since its door opens directly to the street and you can hear people talking while they pass in front of the apartment. Nothing that a pair of earplugs won't fix.