This comes up in pipe bands all the time. As a general rule, the kilts don't look good on the female members and that’s because they aren't designed for a female figure. The construction of a kilt is intended to fit the male physique. Sometimes women have them altered to fit, but then they’re still wearing something designed for a man, but modified.

Kilt skirts are a different animal and are constructed differently.

The newer, cheaper, less structured kilt-like garments and kilt wannabes don’t have the same construction. That’s why many of them look, to me, sloppy on a man and can be worn by a woman without alteration.

Personally, I like the idea of a woman wearing a kilt skirt in the same tartan as her man’s kilt, but I have yet to see a woman who looked better in a real kilt than in some variation of a kilt skirt.