I've seen them in houses. They are nothing more than small, expensive skylights. Their primary advantage is not needing to do any dry wall work other than cutting holes. Makes them easier for DIY. The main disadvantages: small, expensive for the amount of light they give you.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk