It works well. Slightly irritating to install. It fell out once and scared one of the cats. She'll get over it eventually. It's the perfect door to the catio for the other cat which is the one we were targeting with the whole thing anyway. He seems to be able to open it easily.

We have two Pekingese. For the uninitiated, they're dogs. Small dogs. Very small dogs, in fact. They both love going out on the porch. To bark. At squirrels. And anything else that moves. The problem is, more often than not, they want to come back into the house right after they've gone out. It's a rule. And after they've come back in, they want to go right back out. That's also a rule. They're ridiculous beasts, to say the least. But also cute.

During the warmer months, we will leave the porch door open to help the hell beasts move between realms. We have a door screen that self-closes in the center with magnets so that the dogs can push their way out and push their way in as they see fit. It works great and they both make liberal (oh stop, this is about dogs, not politics) use of it.

During the colder months, however, we are at the mercy of their whim, letting them out while keeping the door open just enough that they can push their way back in. The drafts are annoying, and once they've pushed the door open to come in, we have to get up to go close it again...or to let them back out. This would go on all night. Because we have no willpower. And because the annoyance of getting up to open and close the door was still less annoying than having a dog pawing at our legs all night, wanting to go out.

Then we got an idea: what if there was a pet door that could be installed in a window...like one of those dual fans? If I've learned anything over the past 15 years, it's that if you can imagine it, someone is already selling it on Amazon. So, I confidently searched on Amazon. I don't think it took me even 30 seconds to find what I was looking for: a pet door that was mostly designed for cats but also works perfectly for the tiny Pekingese dog breed.

I wouldn't say this pet door is perfect, but it is well made, with a strong frame and side panels. The door itself is perhaps a little flimsy, but as long as it is not abused, it should last a long time.

One feature I did not realize the door offered when I ordered it is a one-way setting. Meaning when you feel that your dog or cat has had enough outside time for the night, you can set the latch all the way to the left, which will allow the door to open inward but not outward.

The latching mechanism is a bit of an annoyance in one way, though: the door simply does not settle back into the right position for the latch to do what it needs to do and there is no easy way to get it there, since the door has nothing to grab on to. We arrived at a simple solution for that, though: we attached a 1-inch suction cup to the lower right corner of the door so that we can pull the door inward to the right position for latching. Easy Peasy. Ideal Pet Products would do well to include a suction cup for this reason. Hopefully they read these reviews.

The side panels are spring-loaded, so you won't have to hold them in place while you tighten the knobs. Just squeeze the panels inward so that the unit is narrower than the window opening; tighten the knobs; set the unit in place; loosen the knobs; let the side panels settle into the sash; then tighten the knobs again.

Amazon will recommend that you buy foam weather stripping. Don't do it; the door comes with some. Now I have some weather stripping that I will likely never use. Will I be initiating a return for a $7 package of weather stripping? Nah. And in fact, I have not yet added the weather stripping that came with it. It just doesn't get cold enough here for me to feel all that motivated to add it. But I will. Eventually.

Regarding the width: My window is just about 28" wide and this product was JUST wide enough. So when they say 23"-28", they mean it. Could you rig up some expansion panels from some other material, like plywood or something? Sure. But just be aware that if you buy the 23"-28" version of this product and your window is wider than that, you *will* need to come up with a way to adapt it.

You might consider adding some sliding window locks if you live in an area where break-ins are a problem. Obviously, if a thief wants in badly enough, they're going to get in, but deterrence measures may slow them down enough that they either give up or get caught in the process. Many people forget that there are many types of thieves: professional thieves, determined thieves, desperate thieves, and casual thieves. The latter will try a window or door and only enter if that window or door opens easily. A little resistance and they give up. The other three groups are unlikely to be deterred, but if you can reduce risk by 25%, isn't it worth it to spend a few dollars for a little added security? I think so.

But back to the dogs. One is a bit of a wild child. She loves to play. She takes risks. She throws her weight around. And she steals treats. She got used to the door over the course of one day. She goes out and comes back in several times per night as if she was raised from birth with pet door opening as her purpose in life. Two weeks later, however, we still have to push the other dog - a prissy, prancing little wuss (unless the wild child steals her treats, in which case it's a Battle Royale) - out the little door because she typically won't go through on her own. And when she's ready to come back in? She looks at us through the transparent door and whines to get us to help her come back in. That being said, she has gone out and come back in a few times on her own. She will get used to it. We went through the same thing when we installed the screen on the door. She is simply slow to adapt. But again, she'll get it. Eventually. It's something you should keep in mind for your own beasts. Work with them. Show them how to use it. If they stare at you from outside, use your willpower and don't let them in. Wait them out. Offer them treats to entice them to come back in on their own. Eventually, if they want in bad enough, they will use the door.

Overall, I am happy with my purchase. And at least one of my dogs is also happy with my purchase. The other dog thinks it is a gateway to hell. Maybe she's right.

Took about 5 minutes to install and it looks very nice. I had to duct-tape the door open for the first several days until my cat figured it out. I think the window panels on either side of the door help with that. They can see that there's nothing scary on the other side of the door.
I like that I can easily remove it from the window at any time.

I don't like that the window is unlocked and open, so can easily be further opened from outside.
So I cut a broomstick and wedged it between the top of the window frame and the top of the open panel.
I guess the cat door could be smashed into the house for someone to get in, but it would take a lot of kicking/hitting, because it's wedged in there pretty tight, so I would hear the noise....and it's kind of a moot point, since I can remove it from the window when I'm gone or asleep.
Works perfectly for me.

I measured my window at 32" so got the one that expands to 32", but it doesn't quite fit snug on both sides. However, it works and I'm afraid the size up wouldn't fit. I like the different in/out options the door gives.

First, this is so easy to install, that "install" seems like a silly word. You basically put it in the window and tighten it. The end.

We have been using it for about a year. Our scaredy-cat took some convincing that it was ok for the hatch to touch her, but she got there. It also took her a little bit of time to figure out she can open it herself. Our other cat has gone right through since day one.

It can be a little drafty around the edges, which is probably the case for anything you place in a window. We bought some foam pieces marketed for window AC units to better insulate the edges. We put a chair cushion in front of the hatch when the cats are in for the night.

Here's a word of warning: our big cat can ram her head into it and get it to open even when it's locked! The little one couldn't and wouldn't. If you need to keep your cat inside sometimes, and she is determined and obsessive beware! The lock might not be enough. It's another reason we use the chair cushion.

Another issue is that the window itself can't lock while the cat door is in. You can either take it out, which is easy enough, or brace the top of the window with something else so it doesn't slide.

The bottom line though is that we haven't found anything better that doesn't involve a permanent fixture.