Would highly recommend Carrie's apartment. My wife and I traveled with our two young children, in order to visit some friends at Columbia and Inwood, as well as to see some NYC sights. This was a great location. Carrie set up a second bed--our kids did not have to sleep in the same bed like they do at a hotel. And we could put the kids to bed and still entertain a friend later in the evening. There was a nice playground close-by, as well as a close subway stop. Really enjoyed Saggio's restaurant on 181st and Mike's bagels on 168th.
I'm not sure if this apt was air-conditioned, although the early April temperatures were cool enough that A/C was not needed.
Only 2 lessons I learned, though, was that it was better to find a nearby laundry service to do our laundry instead of using the 2 washers/dryers for the whole building. It cost a little over $1/lb, but was a great time saver, as we dropped off clothes in the afternoon, and picked them up--folded--the next morning.
Also, it's best to visit NYC without a car, but we drove down from New England and needed to park our car. If driving, I would recommend using a smart phone to find a reasonable and responsible garage, as our car got towed on the first night there. We were about 5 feet away from a fire hydrant, but the NYC rules are that a car should be 15 feet away. Since there are a lot of NY license plated cars within 15 feet, I think this rule might be selectively enforced against out-of-state cars, but I don't know that for sure. Best to just park in a garage if you can't find a good spot, and save yourself $300 and a trip to the tow yard at Lincoln Tunnel.
Overall, a great experience. Apartment was a good value and Carrie worked it so that we could arrive a little early to the apt. Would stay here again!