We have them at work. They are the only kind....no female toilets option.
Single fully enclosed cubicles in a row. They are claustrophobic & can be very smelly. I actually don't feel they are all that safe; what if somebody was taken ill & fainted in one? Nobody would know.....at least in ladies toilets there is a gap at the top/bottom and people coming and going, that just feels a lot safer to me.
I don't know why I mind when I am going to the loo and see a man coming in/out of a cubicle but I do. The toilets do get dirty & smelly because many people don't clean up after themselves properly, I am sure they are worse than ladies' ones.
I don't know why it is a thing for so many people to try to force/rattle the door when not sure whether a cubicle is occupied, risking breaking the (flimsy, often broken) locks - I am sure it is worse too than in ladies' toilets. What is wrong with knocking, or gently trying the door? Why would people not be specially conscious of not invading others' privacy in mixed loos? And of course in a mixed toilet there is a risk here of a bloke bursting in when you are on the toilet.
I am realising that I am actually trying to avoid needing to go to the loo at work. By not drinking too much water (even in this hot weather) or holding on until I get home. This is all new to me to feel this way, but I would feel awkward to complain, wouldn't know how to present the complaint, and don't know if I would be taken seriously or labelled as a troublemaker.