Not me but my aunt. One, It leaks air. She weather-taped the top and bottom shut. Two, when the top was open, it could swing shut in a breeze. I guess you could use a latch to hold it open. Three, when the top was open, her little guy would bonk his head on the bottom corner. Ow.

But they sure are charming looking.

Had one at a former place. It was cute as all get out, and useful on hot days when we didn't want toddlers wandering off (no A/C).

It was so cute, we have one at our new place. On the detached garage. (Really, the air sealing is lousy on those things.)

They are so charming, but wouldn't they allow flying insects (or even a bird) to enter?

My back door, into the mudroom, is a Dutch door. I love it, and I'm willing to give up an airtight seal for the charm. We don't heat or cool the mudroom (unless it gets so cold that my houseplants are in danger), so it acts as an airlock between outside and the kitchen, which has a door with a weather seal. A Dutch door leading directly into a living area would lose some of its charm in the winter.

We used to have an old rooster whose dearest wish was to gain entry to the mudroom, because that's where we keep the delicious ambrosia known to everyone else as dry cat food. It was nice to be able to open just the top door to greet the morning, without having to tackle Duke, although it wasn't much of a fight--he was the sweetest old gentleman.

Also have a bedroom with a Dutch door, which I made from an old hollow-core wood door. I thought it would be nice for a young couple, who might want to be able to hear the kids at night, but still retain some privacy. And it's charming!