The thing is, even in best case scenarios, it's not great.
In some instances they are not so bad, but even there just one person who makes someone uncomfortable can change that.
And lots of women probably wouldn't be bothered in plenty of circumstances - except when they are. I might not mind at work with a couple of men I know and like, who are sensitive, but I sure as heck mind at night in a bus station with people I don't know, some of whom may appear to be weirdos, drug addicts, or whatever. I know lots of young women who shared washrooms at University and didn't mind at all, but then one guy who you had some kind of uncomfortable moment is there, and it's not ok all of a sudden.
So apart from situations where you can control who has access, like in your home, they just don't really work.
The fully enclosed cubical thing I don't like. It's trying to replicate the kinds of individual washrooms you see in smaller places which are usually unisex, but IMO they are too small, I find them difficult to maneuver in and I'm able bodied. You can't really take a child in, much less an infant in even a small stroller, and they make me really claustrophobic. They can be a bugger to clean as well.