They wouldn't work for me.
The article says they would have all female attendants/guards. That (plus some proper outer walls and a roof) would help, but what is the likelihood that some festivals would decide to do without them? They definitely need hand-washing facilities, and definitely need plenty of normal toilets available too for everyone who can't squat, or might need to move her bowels, or is on her period.
The Lapee ones in one of the other links did have bins in them, for tampons/pads and toilet paper, though you would probably need to bring your own paper. That fact that I could see the bins when I just happened to be waiting at the traffic lights beside this bright pink urinal show just how private it was! Oh, and it was a man who was using it at the time.
These ones don't seem to have space for bins and they don't really seem to have thought through using them. If the floor in the gents is covered in pee, at least men don't have to lower their trousers to pee. But women will need to lower their trousers, or the very popular jumpsuits, and then manage to keep them (and probably a bag as well) while still having hands free to deal with tampons etc.
And no, I don't want anyone to see my face when I'm using the toilet. But the short walls seem to be an important part of the design- you have to be able to see whether anyone is in there, as there is no door.