We have those toilets - slightly different design - there is a central wall with the cubicles backing onto them, so boys and girls do not come out of the door and face each other, but the open-plan-ness is the same - complete with what I euphemistically refer to as the fondue fountain at each end, hot air dryers.
Each cubicle has a smoke alarm; the sinks no longer get stuffed with paper towels and taps left to run or little fires started. the incidence of bullying has dropped dramatically, no one can skulk off for a quick fag 9well they do they just have new hidey holes). The complex is opposite the main office so they are observed going in and out all the time - no truanting lessons, no two to a cubicle and so forth.
Its far far safer for all concerned. The down side is the hot air dryers - we now have a full time cleaner mopping up hand shake drips or the floor would be incidentally awash. But again her presence prevents truanting, bullying, poor behaviour and so forth.
Oh it doesn't stop the boys squeezing their spots in front of the girls or the girls whipping out the mascara at 3pm though - they are quite unabashed at carrying out their ablutions in front of each other
despite the office ladies blowing up big pictures of the Marx Brothers in an attempt to stop the fad for big black chunky eyebrows!!!