I guess I should be thankful we have anything. Two years ago there was a major power outage in Queens in the middle of summer and hundreds of thousands of people and businesses were without electricity for 2 weeks. Even so, I'm a spoiled brat and like my central a/c in hot and humid weather. But I've put up with window units ever since we got married seven years ago and I'm done.
First, they're loud. We tried to watch a movie the other night and had to turn it all the way up to hear over the a/c. But Ginger sleeps on the other side of that wall and it woke her up. Bummer. The white noise is nice to sleep to, though, if your husband would only leave it on all night.
Second, they're inefficient. When you "install" one in a rental place you can't make it very permanent so we jimmy-rig all kinds of foam, wood, cardboard, rags and towels around them to try to make them tight, but there are always holes and leaks.
Third, they distribute poorly. Even with the right size a/c for a large room, and a big standing fan in front blowing the air around, it only feels cool nearby. Other than that it just takes the edge off but the backs of my knees are still sweaty, and I hate that.
Fourth, and this is the real reason this is on my mind today besides that our temps went up 30 degrees in the last 2 days here - it's especially frustrating when your husband, who sleeps closer to the unit, puts the a/c on a 4-hour timer before bed, thinking you won't notice and wake up at 3am drenched in sweat and gasping for air, so disoriented from sleep and heat you can't figure out why you feel like you're suffocating.
I'm looking ever so forward to central air (and double checking it before we go to bed.)