Our last trailer had the mini-tub with shower curtain. Actually, it started out with one of those fan-fold semi-rigid curtains, but I replaced it with a curtain so I wouldn't keep hitting my shoulders and elbows on it. It would have been just fine with a curved bar. For the size camper we had, I wouldn't have wanted the exra weight that comes with a glass shower stall.
Now we have a neo angle shower stall with glass door. The only thing I don't like is that the door swings out, so water on the door drips all over the floor and after our showers the bath mat is pretty wet. One of those clamshell-type doors that slide open from the middle would be less messy.